Kareshi to Wakaretai Nonke ga Zetsurin Kyokon de Settoku sa Remashita

A straight guy who thinks he can still have sex with a woman is proven wrong by his boyfriend's huge cock. It's been a year since he was dumped by his girlfriend and comforted by his junior from work. He wants to marry a woman, but for some reason, the person next to him is his "boyfriend." When he tries to tell him that it's not that he hates him or anything but just wants to break up, his boyfriend has one condition.. There is love, but the sex is very cruel! Teach that straight guy a lesson! The older straight guy gets fucked again and again.