Kuroki Kemono to Yoru no Hana

Azuma, who is entangled in a violent world and is the candidate for the position of boss of a gang, meets a blind young man, Haruki, during a visit to a flower shop on his way to the previous leader's grave. What begins as mere curiosity evolves into a deep and comforting connection. As their time together increases, Azuma's feelings shift from intrigue to intense desire for Haruki. This leads to a complex entanglement of obsession and passion...

(Source: Kasakura Shuppansha, translated)