Sweet Angel

The player takes the role of Seisa, a bald-headed photographer. He likes sneaking into a high school and taking pictures of pretty girls. But one day he was caught and beaten by a girl who didn't want to be photographed. So Seisa plotted an elaborate revenge scheme: he managed to learn a spell that allowed him to look like different girls. Naturally, being one of the girls, it becomes much easier for our heroes to earn their trust - and to seduce them!

[From Moby Games]

Sweet Angel is a remake of the doujin game Sweet Girl 2 from the circle Burning☆Apple.