Shun Hashimoto is an openly gay aspiring novelist living in Okinawa who was abandoned by his parents after coming out to them. Mio Chibana is a reserved, orphaned high school student, often found spending his time by the sea. One day, the two meet on the beach, and Shun is instantly captivated by Mio. The days fly by as they slowly begin to grow closer until Mio suddenly announces that he has to leave for the mainland. Three years pass before a 20-year-old Mio returns to Okinawa to confess his love to Shun. However, in those three years, Shun's life has changed. Will he be able to accept Mio's feelings and make such a commitment?

Yoshikazu Miyano's troubles first start one hot summer day when Shuumei Sasaki steps into his life. Sasaki saves Miyano's classmate from a group of bullies, and after that, Miyano cannot seem to shake off his eccentric upperclassman. His silent admiration for Sasaki gradually sours into annoyance each time the so-called delinquent refuses to leave him alone. Constantly being called by cute nicknames and having his boundaries ignored, Miyano wonders why Sasaki wants to get close to him. The shy and easily flustered Miyano harbors an embarrassing secret—he is a fudanshi, a boy who likes boys' love (BL) manga. The last thing he wants is for other students to find out, but through a slip of the tongue, he reveals the truth to Sasaki. Intrigued, the clueless Sasaki asks to borrow a book to read, which he is given very reluctantly. To Miyano's surprise, Sasaki enjoys the BL that he receives and asks for more, marking a shift in their strange dynamic. Although Sasaki appears to possess some personal agenda, his feelings for Miyano become complicated the more time they spend together. As they now share a common interest, their relationship is poised to change and further develop.

Constantly outperformed by the girls' club, the boys' soft tennis club faces disbandment due to their poor skills and lack of positive results in matches. In desperate need of members, Touma Shinjou is looking to recruit capable players, but he fails to scout anyone. Enter Maki Katsuragi, a new transfer student who demonstrates great reflexes when he catches a stray cat in his classroom, instantly capturing Touma's attention. With his interest piqued, Touma ambitiously asks Maki to join the boys' team but is quickly rejected, as Maki doesn't wish to join any clubs. Touma refuses to back down and ends up persuading Maki—only under the condition that Touma will pay him for his participation and cover other club expenses. Maki joins the team, and his incredible form and quick learning allow him to immediately outshine the rest of the team. Although this gives rise to conflict among the boys, Maki challenges and pushes his fellow team members to not only keep up with his seemingly natural talent, but also drive them to devote themselves to the game they once neglected. As the members of the boys' soft tennis club discover their own capabilities, they endure personal hardships and deal with the darker side of growing up in middle school.

Masahiro Setagawa is a hopeless teenager who is often used by the neighborhood bullies as an errand boy. Defenseless, Masahiro knows that nobody will ever save him. However, his life drastically changes when he meets Kousuke Ooshiba, a man known as the Bear Killer, who takes down neighborhood gangs. A year later, Masahiro and his former friend, Kensuke Ooshiba, attend high school, only to find that Kousuke is their math teacher. While the three grow closer, Masahiro starts to view Kousuke as his hero, and Kousuke develops an urging desire to protect Masahiro. However, their normal lives take a turn when Kensuke's childhood friend, Asaya Hasekura, returns, seeing Kensuke as more than just a friend, much to his surprise. Will the three boys be able to live a regular high school life? Or will forbidden love keep them apart forever?