Alternative title:
緋色の欠片 (Japanese)

Genres: romance

Plot Summary: Tamaki Kasuga has supposedly gone to live with her grandmother after her parents are transferred overseas. But the real reason for her arrival is that she must continue the role, handed down from her ancestor Princess Tamayori, to seal the sword Onikirimaru. Five young men serve as her guardians against the mysterious Logos. -ANN

Horriblesubs - Episode 01

Another one of your bishounen reverse-harem animations, but it looks nice, so why not.