Yamaguchi started in Shirokin High but on her first day, student are already trying to harass her. Throwing things and stuff at her and giving no respect. They even made a bet that she wouldn't last long which she heard. Later the following day, Kumai a student of her was accused of stealing. Yamaguchi belived his statement that he didn't but it seemed that he's hiding something... Did he really still the money?

Her life as the advisory class of class 3-D continuous. At school, a surprise awaits her. Her picture was posted in a board head pasted on a naked female. Yamagushi who was mad like hell asked her student about it but her anger turned up side down when she compared her self to a famous model. That's the day she had her nickname Yankumi from YAmaguchi KUMIko. (the m is changed to an n)On the other hand, Minami is dating a new girl. Later that day Sawada and Minami fought.. what could be the reason for this huge commotion?

A snatcher is going around the neighborhood near Shirokin targeting girls or old ladies. Class 3-D is suspected and Uchiyama is the main. Yankumi is certain that Uchi didn't do anything; the teacher who is determined to find the real culprit made a plan. What will happen if all the sign matches Uchiyama? Is Uchi really innocent?

Noda starts having crush on Shizuka sensei. One day, he gave her a necklace but saw her throw it later that day and found out that she is a hostess. Noda who was mad sent pictures of Shizuka in the club and sent it to the head of the school. Later on he felt guilty but Shizuka sensei is to be fired. What will he do?

Yankumi lost her phone and guest who found it. Sawada Shin. Sawada found the address and wanted to return it but ended up in a house filled with Yakuza. Meanwhile, Kumai met a girl and got smitten and for some reasons ended up with her handkerchief. It didn't go well for the two finding out that the girl has a boyfriend. Later that day, some students are targeting the girls boyfriend. When they threatened the boy, he ran leaving the girl alone. What will Kuma do knowing that he has no chance against them?

It is sports tournament in Shirokin high and class 3-D lacks player. Yankumi then found out that she has another student that she never heard of. The student is a victim of Minami and Kuma's bullying. The guy however is reluctant. How can he convince him to go back to school and face his fears?

It is a parent's teacher conference and facing the students parents is as exhausting as facing the students themselves. Meanwhile, class 3-D is admiring a cute girl waiting in front of there school only to find out that she's Sawadas little sister. Yankumi found out that Sawada lives alone while his sister lives with her parents. He left for his father and him couldn't get along. Later the following days, his sister got in trouble and to save her. he put himself into serious trouble. What will Yankumi do when Sawadas father doesn't care at all?

Because of Shin's scary story, Yankumi is scared to walk alone to the school hallway. One time she left her phone and thinks that someone was following her only to find out that it was a little boy. The boy was Yuta Nakashima-sensei's step son. The boy think of the Nakashima as her mom but since they aren't blood related, Nakashima thinks they are not. How will Yankumi give Nakashima her senses?

Yankumi is happy for class 3-D will be hosting a volleyball tournament however they will not the playing.Yankumi thought of something to make them participate and thought of forming a cheer-leading group who will yell chants. Class 3-D aren't into it at all so she told them that they'll be meeting girls there. Everyone agreed and made there efforts. But something is messing everything up. Will things go smoothly?

Everyone is lovelorn that day. 3-D went to a group date wearing formal clothes to keep the fact that they are from Shirokin but soon was revealed. Yankumi saw her long time crush with a girl, and Tetsu the guy who has a crush on Yankumi forever felt that she'll never get Yankumi. But that wasn't the problem, one night, a boy fleeing from a video store he shoplifted from was bumped by the 3-D and were accused of steeling. How can Yankumi prevent them from being expelled?

As usual, Yankumi was called for her students got involved with cops but this time in a positive way. The 3-D became heroes and for some reason, Yankumi gave so much attention of herself although she didn't participate in the hero thingy. Meanwhile, a proud father was giving so much attention to his son which made him mad and say hurtful words . The father passed away all of a sudden. The boy felt bad and put himself in trouble. On the other hand, while Yankumi is trying to help him, some curious reporters found about her deepest darkest secret...

FInally the magazine stating Yankumi's back ground came out and made a lot of commotions. Yankumi was forced to resign but she doesn't want to. The students on the other hand were so mad about the bad article and were force to meet the press but instead of clearing things up, they made it worst for they beat the press. Now the Shirokin High has a reason to expel them and the only way for them to graduate is if Yankumi will resign. What will they do? Owe

Yankumi's students finally enter their graduation. But before that happens, the students prepare for a trip, having to be very cautious that they don't get into trouble or the students may be expelled and Yakumi may be fired. Yankumi, Kawashima and Shizuka also go on a trip. Turns out that the students and Yankumi went to the same onsen.

In the first episode, two characters are introduced. Hayato and Odagiri. Hayato is the leader of class and childhood friend of Odagiri. For some reason, Hayato and Odagiri fought and now Odagiri Ryu quit school and is now working to some dangerous guy. Odagiri refuses to go to school as well. How will Yankumi bring back her precious student back to school?

Yankumi has convinced Ryu to go back to school but Hayato is still against him. The atmosphere in class suddenly changed when the two met. Although Ryu isn't against the reconciliation thing, Hayato still holds grudge of what Ryu did in the past. While Yankumi tries her best to let the two make up, Hayato took Yankumi as an annyoing teacher leading him to challenge her.

Some guys are around the neighborhood beating people up and claiming that if they have any problem, they can go to Kurogin high. They also say that they are Hayato and Odagiri. One night the two were set up on a crime they didn't commit and the worst is no one believes them and the police officer wants them arrested. How will Yankumi find the impersonator and clear her students name?

Girls are coming to Kurogin high and class 3-D are so excited but ended up scaring them. On the other hand, Tyuchi, another student met one of the girls in a books store shoplifting. Tyuchi didn't turn her in and brought her to an arcade instead. He then knew that the girl is the teachers pet who is considered "PERFECT STUDENT" of her previous teacher whom he didn't get along with. While in the arcade, the teacher caught them and got themselves in a serious trouble.

It's valentines day and Takeda is having a huge crush on a girl working at a restaurant as a waitress. Takeda never said anything to her but alwys eats in the restaurant just to see her. He does everything to be noticed even accepting a "make believe" from her friends which made the girl totally hate him. Takeda felt really bad while Yankumi gave him good advice. But when he knew that the girls boyfriend is two timing her, it's up to him on how to make things right.

In this episode the story focuss on Hyuga. When they were asked if they already knew what to do in the future, Hyuga had set his mind into something and actually, he had his mind into it now. Hyuga started working to a guy but made his mother really worried. On the other hand, Hayato and Odagiri found a wallet and returned it to the owner. The two ended up taking the guy home and discovering something.

Yankumi is on a job hunt for after three months she's out of the school considering that the chairman hates her. On the other hand, her student will soon be so Yankumi tries her best to find a job for them. Tyuchi was the first but because of a street fight, he lost his chance of applying. Yankumi was disapointed but still tried her best to find jobs for them and made the students promise not to fight until graduation.

Kuma's shop (previous student form season 1) is being threatened by some bad guys but refused to tell Yankumi but did seek help from Hayato. He figured out that since he graduated, he is no longer a student of Yankumi so he can't just ran to her every time things gets bad for him. On the other hand, the family of Hayato will be introduced and where in the world did he get his jerky attitude.

The story line in this episode is Odagiri and his father. The father of Odagiri is a high ranked police which is the opposite of Yankumis grandfather. The father is against the friends of Odagiri and locked him up but his friends helped him break out. How will Yankumi helped her student when her family is in the line?

After few days, the class 3-D will be graduating but problems occurred when Kudou came. The class 3-D promised not to fight till graduation but when Kudou's gang attacked them... On the other hand, the chairman is determined to kick out Yankumi together with her 3-D. What will Yankumi do?...

Three years after her resignation from Kurogin Academy, Yankumi returns as the new homeroom teacher of Akadou Academy's 3-D! Upon her arrival, she discovers that the class is full of delinquents, and is divided into two opposing groups that are always at each other's throats. One of the students, Kazama Ren, is suspected to be behind a series of muggings, and while the rest of the class doesn’t seem to care about his predicament, Yankumi resolves to prove Kazama's innocence.

Determined to teach class 3-D the true meaning of comradeship, Yankumi seeks out different ways to relate and get closer to the students, yet all her efforts seem to be thwarted. Meanwhile, the two heads of said groups, Ogata Yamato and Kazama Ren, decide to have a one-on-one fight to finally determine who's the better boss, but when this turns out futile, they find themselves settling their differences in the most unusual of means.

The Spring Inter-Class Competition is nearing, and now that Ogata's and Kazama's sides have already made peace, Yankumi is more fired-up to have the whole class join and conquer the rugby match. Ichimura "Ichi" Rikiya, Yankumi's student, meets an old classmate from junior high, Takasugi, who seems to be a quiet, studious boy, but actually has a dangerous side to him.

Yankumi, the teachers and class 3-D meet Kaoruko, Kazama's older sister. She visits Akadou Academy, and chastises Kazama upon finding out that he has a part-time job, which is prohibited in school. Amidst the "Springtime Eliminate Delinquency Campaign" organized by Sawatari, Kazama faces the possibility of expulsion for deliberately hitting a police officer, causing him to have a falling out with his sister.

Yankumi talks to her students’ parents about their future during PTC, one of them being Honjo Kengo's dad, a tofu store owner. When he collapses from over-fatigue, class 3-D fears that Honjo will have to drop out, so they decide to raise money to help him out by trying out different jobs. Honjo, on the other hand, encounters an old senpai of his, Narita, who lends him the money he needs – but with serious consequences.

Class 3-D is planning a hook-up party with some girls from the neighboring schools, but Kuraki "Kura" Satoru is indifferent... for he is actually in love with Saki, a sickly girl he met a week prior. Wanting to take a break from the confines of the hospital, she calls Kuraki, and the two go out to have fun, until Saki's disease kicks in. This enrages her parents, and they file a complaint to Sawatari, prohibiting Kuraki from ever seeing Saki again. Unable to bear her student's misery, Yankumi steps in to help.

It's time for Akadou Academy's annual festival, and Yankumi encourages class 3-D to participate. At first, everyone is uncaring, but the promise of girls visiting the school during the event ignites their enthusiasm, and they agree to form a coffee shop named "Hottie Café". Trouble arises, however, when Ogata, Kazama and the others unwittingly piss off Goda Ryuuji, an Akadou alumnus with a notorious reputation, who retaliates by vandalizing the school the night before the festival.

Ami, Kuma's wife, is approaching her due date. While an excited Yankumi prepares for the baby's birth, one of her students, Kamiya Shunsuke, finds himself frustrated when he gets beaten up by an Ara High bully in front of his girlfriend. Subsequent events with his mother and Kuma take a toll on his temper, and Yankumi races to rescue Kamiya when he picks another fight with a bunch of punks, as well as teach him an important lesson about strength.

Class 3-D is awarded for catching a thief during a secret night visit to school, yet their celebration is short-lived when they get into a scuffle with a few classmates who gets themselves involved with a bad crowd. With only a few months left before graduation, Yankumi strives to reunite everyone and restore 3-D's friendship.

Curious about why Yankumi is so strong despite her looks, Ogata and Kazama's group decides to follow her home, and gets the shock of their lives when they discover who she really is. The cheery atmosphere in their family greatly contrasts Ogata's – his father, a strict teacher from the elite Kaitoku School, is very disappointed with Ogata's status as an Akadou delinquent, and blames his irresponsibility for his parent's divorce!

It's almost time for the finals, and class 3-D is determined not to fail in order to have a great summer break. Apart from that, they also have to avoid expulsion by not getting into any more trouble, but that appears unlikely when Goda is on the loose again. Swearing vengeance, he raids Akadou Academy and gravely injures Kazama, leading to immense chaos that seems impossible to stop, even for Yankumi herself.

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