主角仁岁是个孤苦伶仃的高中生，却有五位美女老师抢着要当他的妈咪。被众美女所环绕的生活真的是超级快乐又幸福吗？还是苦在心头口难开？卷起日本「妈咪老师旋风」的「HAPPYLESSON」，带你前进爱的乐园！

这次仁岁满江红的成绩单，让教古文的睦月老师决定变身为家庭教师，每天在家好好督促仁岁用功。但在这同时，阴险狡诈的房屋中介商正觊觎仁岁所住的房子，为仁岁与妈咪老师们的生活投下了阴影…

当初拯救仁岁脱离不幸而成为他妈咪的弥生，最近又重新想起了自己的使命。一如惯例的无视于仁岁的抗议，弥生开始想尽办法为仁岁消灾解运。在经过日夜不停的仪式作法后，弥生妈咪终于病倒了..

和仁岁在同一个育幼院长大的水无月和叶月，从小就和仁岁亲如兄妹。水无月一直很羡慕仁岁和妈咪们热闹的生活，但是看在叶月眼里，却误以为水无月想和仁岁住在一起。为了实现水无月的心愿，于是一场仁岁争夺大赛再度展开…

仁岁一家快快乐乐的滑雪去了。滑雪技术超烂的仁岁，接受五月的魔鬼训练，两人却误闯禁区落入了山谷中。仁岁背着脚踝受伤的五月，偏偏又碰到了一场大雪。在狂风冰雪中，两人是否能够安全脱困呢？

新加入角色迦娜初登场！如月突然收到了一封中奖通知，莫名其妙得到了一艘游艇。仁岁一行人于是决定驾着游艇玩一个暑假，却因为引擎故障而来到了一座无人岛。在岛上仁岁遇见了神秘少女迦娜，并发现迦娜居然是如月的旧识，而且似乎别有所图…

仁岁就读的学校要办运动会了。意兴阑珊的仁岁，却在班长文月的报名下，被迫参加其中多项竞赛。水无月和众妈妈们听说在运动会中表现优异的学生，能够在学期成绩上得到加分，于是偷偷替仁岁在各项比赛中大动手脚，搞得不可开交...

爱穿天使装的卯月，在一次户外写生中，认识了一位叫做健太的小朋友。健太以为卯月是真正的天使，卯月也没有否认，和健太玩得十分开心，两人相约下次假日在同一个地方见面。卯月还替健太画了幅素描，准备届时交给健太当礼物，但是...

在周一的朝会上，校长宣布为了节省经费，将要废除社员人数不足的社团。由班长文月所领军的弱小文艺社，于是也面临了生死存亡的关头。在这同时，妈妈老师们也正在动脑筋，想拉仁岁和水无月加入自己担任指导老师的社团。最后仁岁他们究竟决定加入哪个社团？而文月班长文艺社的命运又将如何呢？

仁岁和水无月两人的大姊姊－当红偶像歌手叶月终于如愿以偿，成功地在从小向往的音乐厅里举办了演唱会。但梦想实现后，叶月反而失去了生活的目标，不但宣称放弃歌手身份，还成天待在仁岁家里无所事事。终于有一天，仁岁忍不住了，决定当面把叶月好好骂一顿…

科学狂如月制作了一台可疑的大型实验机器，而且实验对象居然是她自己！实验结束后，乍看之下似乎没有任何变化，但到了隔天早上，大家赫然发现如月的行为愈来愈怪异！不只是饮食习惯与过去南辕北辙，一举一动更活像是弥生的翻版！仁岁非常担心如月妈妈的状况，但其它的妈妈们却不以为意…

仁岁们就读的高中将举办校园文化祭啰！与仁岁一起负责鬼屋的文月，打算借着这次文化祭向仁岁告白自己的心意。立志要捕获仁岁的发明狂迦娜，也趁着文化祭的机会混进了校园里。一场我爱红娘的配对活动，将为文化祭掀起一段意料外的高潮！

欢乐课程终于进入最终话。在偶然的机会里，文月得知了仁岁目前和五位妈妈老师们住在一起！带着复杂的心情，文月向仁岁说出自己其实已经获知了这项秘密。仁岁一家人将面临解散的命运？出人意料之外的结局请你拭目以待喔！

The teachers are chosen to model new school uniforms, and Chitose is "randomly" chosen to be escort Mutsuki's escort. The new neighbor is spying, and seems to have it out for Chitose. Well, each sensei-mama throws her own flair into her time on stage. Wait! Who is this guy attacking Chitose? And why does he look so much like the new neighbor? What is their connection? And will Chitose escort Mutsuki? And what does Muuchin mean?

The uniform modeled by Kisaragi won the vote. It seems the neighbor has been peeking at the family's house. But why? Chitose receives a challenge delivered by knife message? And the new guy is attacking him?

Nagatsuki asks Uzuki why she is Chitose's mom. Uzuki decides to take Chitose to an amusement park because of this. Outside the park, they find Fumutsuki and Chitose has to act like he bumped into Uzuki on accident. They get split up... but wait, the girl next door is following them. What is she doing there? Then in a freak accident, a ride breaks down and a fire is started by a couple using a lighter to see the exit. Oh no! A mother and her son are trapped! Can Uzuki, and Chitose save them in time? And what does Uzuki know about this girl?

Well, looks like Yayoi has her hands full. Visitor after visitor, problem after problem. Mutsuki worries about Nagatsuki. Satsuki needs to borrow slippers. Kisaragi comes with a delivery, and stays for tea, then leaves to work on a secret. Nagatsuki visits for her health check, and gets some good advice as well. Then Nagatsuki tells Yayoi a little more than she wanted to know about Fuuchin, or father. Minazuki hurt herself in gym? Well what do you know, Hazuki is home again. Hazuki is the one that told Nagatsuki? Wait, Chitose is skipping classes? Huh? Fumutsuki is having thoughts about someone other than Chitose? Who? Uhoh, Satsuki ruined the slippers Yayoi lent her, and they were Uzuki's slippers for Cos-play. What? Chitsose has been sleeping all day?

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We don't have an overview translated in English. Help us expand our database by adding one.

We don't have an overview translated in English. Help us expand our database by adding one.

We don't have an overview translated in English. Help us expand our database by adding one.