My older brother is a world-class programmer. One day when we were playing games together as usual... he asks, "Can I try an RTA... on you??" An RTA (real time attack) is game terminology for trying to clear a game in an little as possible time.
A woman ends up taking care of her first love after she becomes his guarantor and her feelings for him are rekindled. Then, as a sign of gratitude for all her trouble, he makes a proposal to her. An offering of... sex!?
It's been four years since you've seen the man who took you in. The man you love... Surely he will be mad that you ignored his calls to catch up. But you don't want to return to your former relationship. The time is ripe for your harvest.
"If you don't keep quiet, what do you think is going to happen to your sister?" Forced to take aphrodisiacs by your brother's drunk senpai, they'll have their way with you, and so will your brother... (CV: Yuusei Noki / NikaisenAtaru / Rei Hashiba)