Rift (Conro)
In his grief over losing his father, Natsuki seduces Yuni, his closest friend, and then disappears from his life. Yuni is left confused, with no way to find Natsuki, and can only hope he'll keep his promise of attending the same university. But when they finally see each other again, Natsuki seems desperate to forget what happened between them, while Yuni has realized his own feelings. The final dream with Natsuki's father is a tearjerker.
Seifuku wo Matoeba, Umaku Uso ga Tsuketa no ni
Once inseparable childhood friends have become rival pilots, but it's really a bunch of unresolved feelings going back to their middle school days. Things work out just fine.
Naked Sword and the Tree Peony of Black
Kengou's childhood friend Touma refuses to part from him, becoming a lawyer and eventually scheming his way into the yakuza in spite of Kengou's resistance. The one with the sake cups semen joke, which...tbh I thought was kinda hot.
Crack Star
Years after close high school friends separated following graduation, they reunite in Tokyo when one shows up at the other store asking for a place to stay.
Sono Suki Honto
Years after they dated for a month as a result of a punishment game, two men are reunited at work and have a chilly relationship. But after a welcome party, they decide to give dating another whirl.
Toriaezu Kiss Shite Kudasai
Taira's one-sided crush on Renji reaches new heights with the help of an AV. Inseparable best friends face an uncertain future when one believes the other likes a girl. Thanks to the comments section, I've been introduced to "Heather" by Conan Gray and agree it fits the last song to a T.
40 x 40 Chikuwa Kaigi
Twenty-two years after they fell in love in college, two 40-year-old chiefs are divorced by their wives and get a second chance.
Hina wa Mitsuiro no Koi ni Torawareru
Playboy Kou picks up poor Shinobu fresh off of a broken heart and brings their one-night-stand into the workplace when they realize they're president and subordinate. But when Shinobu falls in love, Kou cruelly dumps him and moves onto the next toy. Shinobu realizes their relationship was just a game, accepts a job transfer, and ends personal contact. Kou, who has never been in love, grows distracted and ill. Coming to terms with his feelings, he attempts to confess to a wiser Shinobu, who understandably takes it as part of the game and rejects him, leaving Kou to do what he can to regain Shibou's trust. REALLY GOOD CHARACTER DEVELOPMENT! Kou is a real jackass, but he learns from his past behavior and becomes a much better version of himself. I was really surprised and pleased to see a story address this. Shinobu used the time to gain confidence in himself. I hope good things for him. And Shinobu's friend Kenji is the sweetest!
Kanemochi-kun To Binbou-kun