Tenshi na Konamaiki

Megumi Amatsuka is a young boy. One day he picked up an old book but there was a demon living in the book. The demon said that he can grant one of Megumi's wish. Megumi always wanted to be a tough man (The man of Men) so he makes his wish.

Unfortunately the demon was a wicked one and he magically turns Megumi into a cute looking girl. Megumi grew up as a tomboy, but pretty girl, and now she is going to be a highschool student, and all of the students admire her.
But Megumi still feels/acts like a boy ...