Akumariage

Kairi Tsuji was born with mysterious marks on his hands. One day, a demon appeared before him in order to take his soul as part of a contract from his past life. Kairi is in shock at the sudden turn of events, but the demon, Raju, cursed Kairi with the marks on his hands in order to prove it. Just as Kairi thinks his life is over, Raju pushes him down and takes his virginity...?!

(Source: Junet, translated)