A yandere girl named Kokoro is in love with a timid girl named Ryona, and Kokoro wants to protect her but there's one problem - it seems like a yandere boy is taking a big liking to Kokoro, but Kokoro is not gonna let him hurt her Ryona.

A story about a yandere girl named Kokoro Shiwasena, who's in love with this girl who's really timid named Ryona Shai, who Kokoro wants to protect from bullies and anyone else who can get Ryona in danger but there's one problem - it seems like a boy named Yutaro Sakaguchi is talking a big liking to our poor Kokoro - but Kokoro is not gonna let him hurt her Ryona.—heart chan