Ore no Kokan wa Bishoujo Datta no ka

Story

Ayuriku Kosuga, a high school boy, was living an ordinary, boring life. Ayuriku thought that spring break would also pass without incident... but... But then... his penis became personified as a cute girl! "My crotch became a girl?" What's going on? The story is about the unusual commotion caused a penis coming to life as a pretty girl. A comedy of strange and unusual events, here it comes!

Synopsis via AniList (English).