There was a manga that I read a while ago and you guys know that I am a certain person with really bad memory, so i don't remember the title of the manga. Ok, but i do rememer the plot, so the plot of the manga is the girl used to be fat and play baseball or softball, and she was made fun of because she was fat. Then years later she work out and became skinny and was thinking of getting revenge, i think she was getting revenge on the main character guy because he did something to her, but that's all i can remember from that manga. So anyone have a clue to what the manga is?

edit: Okay, I really do have bad memory, the description is off by a little, so I am sorry for the wrong description, I have found the manga already, and the title of the manga was "Kaikan Trap." Thank you everyone for helping me out.

Don't know the name but it sounds interesting

You are now inside my Tsukuyomi. For the next 72 hours... I will slap you with this trout...

Resistance is amusing...

Girls Saurus and Girls Saurus DX are ones that come to my mind.