Guardian Hearts is a oVA anime that premiered in spring 2003.

About the production: the story comes from a manga, there are 6 episodes of about 17 minutes and its current status is "finished".

Its main genres are comedy, ecchi and romance.

On AniList, Guardian Hearts has an average score of 53%, an average score, and appears on 2,155 users' lists.

The franchise continues in or follows from: Guardian Hearts-Power UP!.

Maya, Kurusu, and Chelsea hit it off really well when trying to get revenge on Guardian Hearts for making them suffer. Maya and company thought that Guardian Hearts usually appears when Kazuya is getting along with a girl. Not knowing that Guardian Hearts is actually Hina, they leave her alone with Kazuya in an attempt to lure Guardian Hearts. (Source: AniDB)

Official synopsis from AniList.