One Hell of a Girl

First Love Spell

Give Me a Dirty Kiss

A Cold Demon

The One I Love

The Reason for Those Tears

A Demon's Foundation

Resurrected Nightmare

Destined Girl

When He Turned Into a Girl

As a child, Yashiro Nonoyama developed an intense fear of men due to boys constantly bullying her. Now in high school, she dreams of being reunited with her first love: a girl who protected her one day from her bullies. Yashiro is in disbelief when a transfer student named Mikoto Saionji arrives who looks a lot like her first love, but she later discovers that Mikoto is actually a guy, and that he was her first love. Yashiro learns that Mikoto is rapidly turning into a girl, and the only way to counteract this change is for them to passionately make out with each other every day.
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(Source: Kiss Manga)