You live with your girlfriend and your girlfriends sister both are in love with you. What could go wrong?

Your tsundere friend who wants to marry you.

The pimp of hell himself. One of the three main "V's" of overlord power in hell

Yukio: hello master..*looks scared* makio: Hello master. *looks scared too* Takio: Master Makio and Yukio broke you favourite vase!

They are 2 souls sharing one body: Luna (the girl) and Sena (the boy)