From Now on, You're My Demon

After losing both her parents, Hina, a female hight school student, became orphaned and was taken in by her grandmother. Later as she headed to the church for the last night of her grandmother's funeral, she remembered that her grandmother told her "I can't pass away until I've seen you in your wedding dress, Hina."

Stricken with grief after becoming all alone, thoughts of "I don't want to be alone anymore." kept repeating itself her mind, a bell rang. In that moment as she spoke her vows before her grandmother's coffin, a man suddenly appeared in front of her?!