My backlash as G, the world's most hated girl, is G

As a repeat student, I lived in an old rental house. There was a married woman living next door, but it was cold to me. One day, "G" came into my room, and while trying to get rid of it, I bumped my head and lost consciousness. And when I woke up I was turned into a 'G'!? What should I do...but wait? Can you peek at the wife next to you by saying "G"? I went straight to peek and found out that his wife was cheating on me. If you know that, then it's "G-sama"'s counterattack...! But how will he return to being human...!?