Yusuke Mizuki  

Yusuke is an orphaned high school student who must fend for himself. On his way to class one day, he takes a shortcut and gets hit by a silver bracelet. He stops after the impact, and then sees a young girl floating down from the sky towards him. The girl only remembers her name, Rouge, but has no memory of anything else. Yusuke brings her back to his apartment and they get to know each other. Eventually, he promises to help her recover her lost memories and allows her to stay with him as long as she needs. Despite being attracted to Rouge's innocent nature, Yusuke tries to be a gentlemanly and caring person towards her. It is also worth noting that Yusuke often says "Oh Mother, Oh Father in Heaven!" when things go wrong.