Yuusuke has a problem that any man would want, and one most men fantasize about. Rena, a young lady, has asked him to be her “private instructor.” Rena is a beautiful, well-endowed young lady, which is perhaps why Yuusuke agrees to be her “private instructor.” This is where his issue starts. It’s self-evident that tutoring isn’t something they’ll be doing. Yuusuke stumbles into Rena’s mother when he comes over for Rena’s lesson. One word to describe her breasts is “wow.” Rena’s mother has a Triple-F Cup that is much bigger than Rena’s. She puts it all on the line and climbs all over Yuusuke. Here’s the key issue: The battle for Yuusuke is about to begin, as mother and daughter prepare to demonstrate their sexual prowess in order to win.