Yuzuki is introduced to his mother’s new husband, Seiji. Yuzuki hoped for his mom’s happiness but instead he got taken advantage of. Whenever Yuzuki's mom was out, Seiji would have his way with him. One day, Yuzuki's mother and Seiji got divorced but Seiji threatened Yuzuki to stay with him. Enduring the humiliation, Yuzuki waited for his chance to escape. While servicing Seiji as usual, Yuzuki tries to butter him up with sweet words. But as a result, Seiji ties up Yuzuki and fucks him to his limit. As Yuzuki screams for help, declaring his hatred for his new father, Seiji suggests. "If you can withstand my cock for 30 minutes, I'll let you go. However, if I make you cum, you're mine for the rest of your life." Yuzuki sees this as his chance to escape and accepts the offer. Who will win this competition? Will Yuzuki become Seiji's woman? What future will Yuzuki choose for himself...?