Read OOPARTS manga
It has always been a one-sided love for Kima. Kima had slept with many guys since high school. However, Furudate was the only student he’d ever loved. Neither has he done it with Furudate before, nor confessed his love to him. One day his mother’s lover, Ishiki, appeared before Kima… and so, this unbelievable yet physically and mentally heartbroken love story is presented!