Yuka lives with her daughter and son-in-law. She is currently working as an underwear model influencer on social media, partly to release the frustrations that build up every day. One day, she accidentally finds out that her son-in-law, Kenichi, has a huge dick... As she listens to him complain about not having sex with her daughter recently, she can't help but bite down on his erect dick. "In place of my daughter..." she tells herself, but her body is constantly craving her son-in-law's huge dick...