Sensei, Ore ni Irozuite

"Listen, Mr. Yukimine. Why don't you let me color you mine?" A straitlaced teacher finds himself trapped in the obsessive affection of one of the most feared men in the yakuza. Mr. Yukimine, a middle school teacher, works tirelessly every day, even sacrificing sleep, to ensure he never disappoints his students or their parents. Naturally, he thought he was fully prepared for the round of visits to his students' homes that had begun a few days earlier. But then he discovers that one of his students comes from a yakuza family! To make matters worse, Kuga, the right-hand man of the family's future boss, is there waiting for him and suddenly declares, "Mr. Yukimine, I like you." Terrified that refusing him might get him killed, Mr. Yukimine has no idea what to do. Yet despite Kuga's forceful advances, his touch is unexpectedly gentle. Even though he knows full well that he's in his student's home, Mr. Yukimine gradually finds himself unable to hold back the increasingly heated sounds escaping his lips...! (Source: Coolmic)