At their high school graduation, Takashi confessed to his friend Hayate, who responded, "Until you find someone you like more than me, once a year, on your birthday, I will go on a date with you." Ten years have passed and Hayate's love has only grown. Unable to deal with his unrequited love any longer, Takashi decides to make this year the last. So, Takashi lies, "I found someone I love." When Hayate meets Takashi's love, he drunkenly tells Takashi, "You can just like me!"
Ch.2-4,6: After having his heart broken, cameraman Ooshiro becomes interested in innocent, new actor Naoya. Before a shoot, Ooshiro feels betrayed, after seeing marks on Naoya's body, but also realizes how much he has fallen for Naoya
Ch.2: Toki conspires with his childhood friend Shizu's grandma Ai to seduce and marry Shizu
Ch.1-2,6: Shina is always forced to help his ero-mangaka friend Mandayuu with his work. While helping by modeling for him, Mandayuu confesses his feelings and takes Shina
Ch.3-5: After becoming the tutor for his boss's son Seiichi, Shina is reunite with Iwabe, his crush and senpai from high school who rejected him. Now, Iwabe is forcefully pursuing Shina, but Seiichi, who likes Iwabe, gets jealous
Tateyama has been secretly in love with Kaiya, a popular, but cold model at his school, for 2 years. When Kaiya discovers Tatetama's scrapbook of Kaiya's modeling work, Kaiya begins to use Tateyama as a plaything, and, though Kaiya treats him cruelly, Tateyama can't seem to push him away. However, after Tateyama reaches his breaking point, he decides to disappear from Kaiya.
Masaya and Yuuma are childhood friends, whose families have been fighting for generations. Though they are arch rivals, Masaya still cherishes their childhood memories and the small treasure Yuuma shared with him. However, their relationship changes, after Yuuma gets engaged to their mutual childhood friend and Masaya's crush, Akiko.
Ch.5: Problem student Tsujidou catches the attention of disciplinary committee president Kirihara, who rapes Tsujidou. Though Tsujidou thought it was Kirihara's way of reforming him, Kirihara continues, even after Tsujidou changes
Ch.2: Drunk after being rejected, Noda is taken home by a guy who saved him. When he wakes up, naked, he's freaked out to find the man has a gun, which the man uses to pressure Noda into going another round
Ch.2: Even though Yuusuke can't stand being pulled around by Hibiki, he and Hibiki still continue to breakup and get together at Hibiki's whim
Ch.4-5: Since 5 years old, Hiroshi and Akira have shown their love through their fists
1/365 no Koibito