Um...
The protagonist is very sane, the female-to-male transformation is NP, and the protagonist is an attacker.
I will try to write as truthfully as possible without being abusive.
This is my true wish(?)
I wish this was me! ! !
The protagonist is a person with a very contradictory personality. He is cruel, but will not hurt innocent people, but will sacrifice the interests of others when necessary. He is very insightful into people's hearts. This is the protagonist's transformation from having only ability but no practice to becoming a real evil attacker.
Anyway... That's it. Come and take a look and you'll find out.