Takumi's parents divorced when he was just 5 years old. His father recently remarried and he has another stepmother. Miki is a gentle, caring, and worried woman for Takumi, giving him the warmth of motherhood. Miki wanted to be close to Takumi, so she came up with the idea... Take a bath with him! Because he was still a new man, seeing a woman's body made his cock quickly stand up! Miki took the initiative to bathe Takumi's body, but because she was already drunk, she touched the cock and he immediately cummed! Feeling that he ejaculated a little early, he went online to find out how to treat. Miki accidentally finds out about this, she wants to help Takumi gain confidence in herself and teach him more about sex. Thinking of doing it, Miki continues to bathe with Takumi, but this time she takes the initiative to give him a squeeze on his breasts, touch his pussy, suck his cock and let him fuck her! From then on, Takumi was always given more instruction about sex by his stepmother. Because he was already smart, Takumi learned a tenth comprehension, and he quickly made Miki unable to forget his cock. And the happy life of the family of three continues like this...