[Echigoya Takeru] I Suddenly Turned Into A Girl! (COMIC Unreal 2021-06 Vol. 91) [desudesu]

Ayumu's life is thrown into chaos when a sudden transformation turns him into a beautiful schoolgirl. Though he tries to act as if nothing is wrong while walking down the streets, the strange new sensations of his developing body are impossible to ignore. As a certain classmate, Kei-kun, takes advantage of Ayumu's new, sensitive form, Ayumu must navigate the overwhelming stimulation and the realization that his body has changed in ways far more profound than just outward appearance.