I Was Reincarnated as a Creepy Fat Guy, Then Trained Myself Without Sleep. And Then, for Some Reason, the Heroines Start Approaching Me

When I woke up, my body had changed from a thin macho to a highly obese, grossly overweight high school student. This is impossible. I was in despair, but then I realized that I was in the world of an erot*c manga I had read long ago. In the story of this world, I, a gross fatty, am supposed to hypnotize a kind childhood friend of the handsome protagonist who looks down on me and sleeps with her with all my might. But I am not a bad person who would commit such a crime. Okay, I’ll work out and lose weight first. The protagonist and heroine should live happily ever after. That’s what I thought. Why is the heroine bothering me?