Hello! Many years ago I remember reading a manga series which every couple volume were an arc (maybe?) and a specifc arc was about a guy who was in love with his mafia-like boss, then he took a bullet for this boss, ended up being taken care by the boss and the boss grant the guy one wish, which is having sex with him (of course)... so the guy was trying very hard not to cum so the magic moment won't end but the boss was like "I didn't say it was a one time olny wish", then happy ending. Can't remember this series name... anyone, please?

i'm guessing they are Youmei x Hizuru from "Kachou Fuugetsu"