It's 2020, and Mizuha's seventeenth birthday is the pits. Her dad forgot, the senpai she likes isn't interested, and her social calendar is getting cleared out by a mysterious virus. But when her longtime childhood friend asks her out, Mizuha has to sort out what this change could mean. And her feelings may not be the only ones changing...!

It's her first summer training camp. On the morning of the second day, when Kao, who's worn out from carrying out her manager duties all day, wakes up, she's in the same futon with Kuze-kun for some reason?! The calm and cool Kuze-kun covers for her, and nobody finds out, but her heart is pounding…! Amidst all of this, the girls of the volleyball club ask her to find out if Kiryu-kun has a girl he likes… Haruka Mitsui has drawn a dazzling after-school love! When Kuze-kun and Kiryu-kun swin...

Kao has no interests, no hobbies, and no friends ... so when she's pushed by her brother to become the manager for the boys' volleyball team, she reluctantly accepts. But her future as manager is contingent on roping in the equally reluctant Kuze-kun, who, despite his passion and talent, seems intent on leaving volleyball behind ...

Kao is a high school girl who wants to shine like other students. Every day, she does her job of managing the boys' volleyball team with the support of club members Kuze-kun and Kiryu-kun. In the meantime, she can't help coming to like Kuze-kun, though she never knows whether he's joking or serious. One day, he suddenly calls her out after an important game, and her heart starts pounding! Drawn by Haruka Mitsui, the story of a dazzling after school romance! Kuze-kun's popularity is explodi...

Shuugo’s brother, Tougo—Mizuho’s first love—came to Mizuho and friends’ school for his teaching practicum! Disregarding Kizuki and the other boys fluster, he approaches Mizuho in a flash. The old friends are thrown into an endless uproar at the appearance of their mightiest rival yet. These feelings can’t be kept under wraps anymore!

During summer vacation, Kao is touched for the first time by Kuze-kun at their part-time cafe job. The two become closer and closer, but when summer's over, there's more happiness to come!! The school festival and club activities take place during the second semester… and Kuze-kun wants to do his best to…? Watching the two of them, it seems as if Kiryu-kun also goes into serious mode?!

Kao's feelings for Nagisa grow deeper at the culture festival. When Kiryu-kun sees Kao like that, he declares war on Kuze-kun! As the day of the match approaches, Nagisa also makes a resolution… Will a big change come to this heart-throbbing love triangle? And has a new rival for Kao made an entrance?! Both love and club activities are heating up!! Volume 6, where everybody is serious!

Just as Mizuho truly considers what Kizuki means to her, her long-admired Saito-sempai professes his feelings! With her system overloaded by new and conflicting emotions, Mizuho comes down with a fever. Her childhood friends are eager to help, but soon realize they have their own tumultuous feelings to face.

Two young men who have been holding back their feelings for so long… After reuniting in 2030, Shin throws down the gauntlet to Kizuki, declaring that he won't let him have Mizuho. Driven by his overwhelming feelings for Mizuho, Shin makes a move…?! Meanwhile, Shuugo makes his own declaration of war and asks Kizuki to compete against him for Mizuho's heart! Kizuki decides to swim again, and vows to win Mizuho back. With Mizuho at the center, the friends reignite their youthful passions that...

When summer vacation comes, Kao gets closer to Nagisa at volleyball training camp and at a summer festival! Kao's feelings get stronger and stronger, and during Obon vacation, she suddenly gets a call from Nagisa inviting her out…?! She thinks she's heading for a date, but instead it turns out she's being asked to help out at a café as a part-time job. As the two pretend to be dating, their feelings become more similar, but is something going on between Kuze-kun and Miki, who works at the ...

When Kiryu gets closer to Kao, Nagisa begins to want Kao to be more aware of him. So what are Kao's feelings for the two boys…?! As the feelings of love heat up more and more, the tournament also begins. And there, something happens that Kao doesn't expect…?! Events unfold at a rapid pace in Volume 7!

Watching fireworks lighting up the summer sky is Mizuho's ultimate vision of romance. Who is the lucky guy to share that experience with her? Kizuki's intent to win over Mizuho is clear, but the others, including the brainy future doctor Shin, can't resist her, either. The special bond between childhood friends seems unbreakable, but growing up sometimes means growing apart-and that's a prospect Mizuho can't bear.