Bakunyuu Oyako - Season 1

A student named Yusuke is approached by Reina, who requests private tutoring. Reina possesses notably large breasts. When Yusuke visits her home for lessons, he encounters Reina's mother, whose breasts are even larger. The mother, experiencing heightened sexual desire, aggressively pursues Yusuke. Both women compete for his exclusive attention. This rivalry intensifies when the mother discovers Yusuke and Reina engaged in a sexual act. The mother and daughter subsequently engage in a fierce competition, each attempting to demonstrate superior sexual prowess to claim Yusuke for herself.