After an accident sent her family to their deaths in the ocean, Hinako Yaotose keeps returning to the thought of sinking forever into the sea herself. With Miko Yashiro as her only friend, Hinako manages to keep up a semi-happy facade, but whenever Miko leaves her side, she slips into despair. Everything changes one summer when she meets a mysterious girl with eyes as deep and clear as the sea, drawing Hinako in like nothing else has in a long time. During her absent-minded search for the girl, Hinako is suddenly pulled underwater by a beastly deep-sea creature, only to awaken to the presence of the girl—Shiori Oumi—who takes on a monstrous form and kills Hinako's attacker. Despite this heroic act, Shiori's intentions are no different from any other monster's: she wants to eat Hinako. The following morning, Shiori walks into Hinako's class as a transfer student, and Hinako cannot help but smile—at last, someone who could fulfill her quiet wish for death has appeared before her.

After his father's sudden death, Ceddie moves to England as an heir to his grandfather, the Earl of Dorincourt. The Earl is a stubborn and selfish old man. Gradually, however, Ceddie's innocent love opens the Earl's heart and changes him into a caring and generous person. This is based on "Little Lord Fauntleroy" by F.H.Burnett.

A gag anime based on the manga of the same name.

Second season to the original Tiger Mask, with a different cast of characters.