Having an affair with his big breasted girlfriend Aika Yumeno's best friend

Kaworu is stuck in a situation, between his girlfriend and his girlfriend's best friend, the woman he truly loves. The day he was finally able to have his best friend Aika, he let go of his burden about her. A secret love affair happened when his girlfriend did not return from a business trip for two days, so he stayed at his girlfriend's house to enjoy sublime sexual moments with Aika.