Birdy's manga / #Isekai(3)

dropped ch 36. 9/30/24

MC cannonically gay isekai into novel where his now little sister (he is adopted) is the FL. But in order to save her from the 3 crazy ML's he breaks into a dungeon and steal the tiara that has a love casted spell on it. MC is actually a cat burglar. But the 3 ML see him in the tiara and fall in love with him. Now the genre changed to BL and they are all chasing after him. I think the ML will be none it will be the "Mystery Man" who has like all the secrets of the kingdom.