Mahou de Onna no Ko ni Henshin! Omou Mama ni Ecchi na Koto o Shichau Ore!

A magical curse transforms the protagonist into a cute DD-cups little girl!?

A dream-cum-true adventure!!

When Soara, masturbation addict, heard about an ecchi school myth that would heighten his personal time he investigated with an eager hand. He traced the myth to a magic spellbook in the library, and in a brilliant beam of light his body was changed!
Now that he's (she's?) feminized the whole town is a pervert paradise. Love with best friend, molested on the train,
assaulted by a stranger. More (trans)sexual situations than he ever expected!

[From DLSite English]