Tomoya Asahina has been left in charge of a failing cafe. To revitalize his business, he has his team of busty waitresses switch out their usual uniforms for cosplay costumes! Tomoya also has a crush on one of these waitresses, the demure Akiho. But Tomoya doesn't have much experience with sex, so all the other waitresses get together to give Tomoya some lessons in the art of love!

Yusuke Kinoshita is forced by his father to work at his restaurant Pia Carrot all summer due to his bad grades in school. What first seems to be a boring job becomes a memorable experience due to his interactions with his co-workers and his boss.

Dr. Narutaki, a genius who is trying to preserve true Japanese men, not the losers they are today, needs semen from one hundred specimens. The problem is that these hundred specimens would not give it to him voluntarily, so he comes up with a plan. He gets Marine, a girl from an all girls school, to put on her a ring which forces her to do his will and a special costume that changes to match a man...