Saki Minase has practiced aikido since she was young, and her proud, yet cheery attitude has won her the adoration of many. But it has also won her the lust of more unscrupulous types...
One day, you are called aside by that pretty younger girl that you've had your eyes on. She confesses to you and without so much of a thought, you accept. Then smiling from ear to ear... she thrusts her huge and erect dick before you.
Due to the large amount of debt made by their relatives, ordinary schoolgirls are in financial hardship. There is no way but paid-dating in order to earn money...!
The protagonist who is forever-alone has been bullied by the heroine, but one day he finally gets furious and press her down...! Since then their roles are reversed.