Ageki Kyousuke, a fat guy with a big appetite, has always been interested in Mitsukura Itsuha, a girl who doesn't stand out in his class.
He comes across her alone on the rooftop after school, exposing her erotic body in an extreme swimsuit!
Kyousuke finds out Itsuha's secret, which is too unexpected to be ......!

[ So in short THICCNESS is great on this one ;) ]