The gang decides to go to the beach for summer vacation, and in order to save up money, Junichi is working at a cosplay cafe. By coincidence, Yukana, Ranko, Yui, and Nene are all working there too. Junichi is working the kitchen, however. The four girls work with the customers, but the manager at the shop is a little weird…

Junichi is getting much closer to Yukana. Shinpei suggests playing the King Game in order to get even closer. Junichi has his friends and Yukana’s friends meet up at Yukana’s house, where they all play the game. Yukana’s in a different outfit than usual in her house clothes, which is surprisingly stimulating to Junichi, and just when things seem to be getting good between them…

Junichi is dreaming about having sex with Yukana and is in a rather pleasant mood. In his dream, he reaches out to feel Yuaka’s breasts, and unconsciously does the same thing in reality, only to find a soft sensation in front of him. Junichi, surprised, awakens to find a rather large-breasted gal on top of him, but he has no clue who she is, and is confused by her gal-speak.

Junichi is eating lunch with Yukana in the courtyard, but Ranko is with them ruining the atmosphere. Kashii Yui, a serious, prim and proper type of girl, tries to talk to him. After school, she takes Junichi to a cafe, and is interested whether Junichi and Yukana are truly dating. Junichi tells Yui just how happy he is with Yukana, but…

Junichi finds a love letter in his shoe box after school, but feels compelled to properly turn the girl down, as he already has a girlfriend. As it turns out, there’s another gal waiting for him who starts to get hot and heavy with him. Only for Yukana to show up at the worst possible moment…

Junichi’s kneeling love confession worked and he’s now dating Yukana. He never though he’d be able to get such a cute girlfriend, and his friends are jealous. Yukana invites Junichi to karaoke after school, but according to his friends, that’s where couples go to have sex. Will Junichi lose his virginity already?

Hashiba Junichi is a high school student that wants to do anything to lose his virginity. His evil friends force him to ask out a gal in his class, Yame Yukana, so he begs her to date him while kneeling on the ground. She calls him a freak, but then something amazing happens…

Honda and Mami seemed to return each others feelings, but their concerns push them apart. Worried about the couple, Mishima and Miharu put aside their own relationship to discuss if there's anything that can be done for them.

Honda and Mami are steadily growing closer, but they both have concerns about their families. Honda is having trouble with his relationship with his mother, and Mami remains unable to tell her family about her relationship with Honda. Then their family issues rise to the surface...

Mishima worries about Miharu's absence from the cultural festival and the way his new friend Nakajima is exhausted from preparing for his successor as student council president. Mishima's class is encouraging Nakajima's childhood friend Kisaki Waka to run in the student council elections, but...

Summer vacation is over, and the Aozora Cultural Festival is approaching. After things went well with Mami at the fireworks display, Honda is delighted to be spending more time with her preparing for their class' attraction. Meanwhile, Mishima checks the shops by the station in order to gather cardboard for his class...

After participating in the three-legged race with Mami, Honda believes they've grown closer. However, when he asks her out on a date, she says... With more opportunities to hang out as a foursome with Mishima and Miharu, Honda is glad to be spending more time with her. When Mami says she wants to thank Honda for helping her train for the three-legged race, Honda suggests a group date with Mishima and Miharu, but Mami's attitude towards Honda is as disinterested as ever...

With the Sports Festival coming up, Mishima and Honda's classmates have high expecetations for them as members of athletic clubs. Honda is made to participate in multiple events by his class. Mami is disgusted by Honda's attitude, but when Honda says something, she ends up signing up for the three-legged race as a co-ed pair with him. The unathletic Mami isn't happy about it, but Honda begins training with her for her sake. As the school continues to gear up for the sports festival, Miharu looks on with a sad expression...

When Honda spots Miharu having a friendly conversation with their classmate Sanagi Nasa in the waiting room of a hospital, he decides to investigate Sanagi's identity and his relationship with Miharu for the sake of his best friend Mishima. Meanwhile, Mishima gets caught in the crossfire of an argument between the track and field team and has been called to the student council room, where he is standing before third-year and student council president Nakajima Mikado and his friend Sakurakoji Masamnue alongside second-year Asumi Natsu.

Disgusted by the irresponsible and talkative Honda, serious class representative Mami has been avoiding him. However, even when Mami begins avoiding him even more after a certain incident at the convenience store, Honda is undeterred. Annoyed by Honda's overly familiar behavior, Mami complains about him to her new friend Miharu, who suggests they discuss the issue with Honda's friend Mishima.

Miharu is scheduled to take time off school and transfer to another hospital for surgery. She feels both anxious about the upcoming procedure and sad to be moving away from her friends. Seeing Miharu in her emotional state, Mishima resolves to participate in his first meet as a regular on the swim team, but the event falls on the same day as Miharu's transfer. As Mishima heads to the meet, he leaves a certain object with Honda.

Mishima has been concerned since Miharu went to the hospital and visits her every day. Honda and Mami are naturally worried about Miharu as well, but they're also concerned about Mishima. One day, Miharu's mother explains to Mishima the events surrounding that day from his childhood. What is the truth behind the memory Mishima has treasured since he was a boy?

Mishima has been unable to focus during swim practice since the new semester started. Though his relationship with Miharu has returned to normal, he still feels as though something is lacking. Meanwhile, Miharu begins missing school for some reason. Mishima is worried but unable to get in touch with her...