Shisei no Otoko
Ch. 1: Katagi and Kubota were classmates who reunite in adulthood after Katagi has become a yakuza and Kubota is a cop. Kubota stings Katagi but also falls for him. Ch. 2: A mafia heir blackmails older underling to sleep with him. Older seme/younger uke. Seemed like the underling was in love with heir's mom so that was weird. Ch. 3: Rape. A brutal yakuza guy rapes a guy in drag. Guy in drag is undercover cop (Kubota), who beats the shit out of him. Ch. 4: Rape again. The yakuza heir & underling seemingly got away fine except for foreboding ringing in heir's ears. Katagi & Kubota seemingly got back together fine except that Katagi was gangraped in prison and intentionally passes HIV on to Kubota as revenge. Turns out that Heir is actually comatose, Underling is dead, Kubota was aware of the HIV and was willingly infected. Why the hell so dark? Ch. 5-6: A college guy has feelings for his friend who goes with the flow in terms of romance. The friend appears through astral projection and they spirit-sex. It turns out it's tearing friend's body up in the real and he demands a confession. Megane uke.
Snip, Snail & Dog Tail
See-through
Ch. 1: A guy hates rainy days because "things become transparent," like his feelings for his popular friend. Unexpectedly, they kiss. Megane uke(?) Ch. 2-5: Akitsugu has had a crush on Kei since middle school because of the way that Kei had a crush on their classmate, Maya. A weird Kei phantom appeared in Akitsugu's room and complicated his life. Unrequited.
Graduation Certificate (artbook)