Today is Valentine’s Day. While girls and boys are excited, Tanaka, who’s not interested in Valentine’s at all, finds a box of chocolates inside his bag. Judging by the pretty box, it’s obvious the giver has feelings for him, but Tanaka feels despair just thinking about having to show gratitude or giving something in return. There’s no name on the attached message and only says “I’m watching you all the time.” Tanaka and Ohta try to figure out the culprit... i.e. the girl behind the chocolates.

For the first time, Ohta is absent. Tanaka needs to deliver a worksheet to Ohta, but he doesn’t remember Ohta’s place because he’s always carried there. Being yelled by Echizen that he should know more about Ohta, Tanaka and Echizen head to Ohta’s house together. Ohta comes to school the next day, but he has a sprained ankle that will take a week to heal. While the classmates wonder who will be taking care of Tanaka, Tanaka claims he will be taking care of Ohta.

Tanaka hasn’t really been in a fast food restaurant because he’s not a fan of the fast-paced atmosphere. But he tags along with Ohta to WcDonald’s (a.k.a. Wac) so Ohta can try the limited edition sweet. Contrary to Tanaka’s expectations, the service is great and no one cares if he’s being lazy in the restaurant. Delighted by the relaxing atmosphere, Tanaka even starts admiring a Wac’s employee. But, the employee is frightened at the lazy-looking and scary-looking high school boys...

On a hot summer day, Ohta and Tanaka go to the public pool. Ohta wants to swim, while Tanaka simply wants to cool down in the pool because he can’t swim. Tanaka, who usually doesn’t move, gets a cramp during his stretch. Under Ohta’s supervision, Tanaka enjoys the pool with his water tube. However, two little kids pick on Tanaka and his water tube rips… Few days later, Miyano comes to ask Tanaka’s advice about wanting to wear a yukata for the upcoming firework show. Along with Shiraishi, the group decides to go to the kimono store...