Oni no Hanayome - Karada ni Kizamareta Emono no Shirushi

If I get you pregnant, youll have no choice but to be my wife. The boy who suddenly appeared before Rin is her fiance!? But his true form is that of a man-eating demon... Rins parents passed away when she was little and she has been living with her brother ever since, caring for the family shrine. One day, she meets a transfer student, Suo Kusa. He kisses the birthmark on her neck as he exclaims I finally found yo...