While my father is away, I'm alone in the bath with my stepmother... ~Incest of my innocent virgin son~

Since his son Takumi divorced when he was 5 years old, his father, who had been raised by himself, has remarried. Then she begins to live with her stepmother, Miki... Miki, a caring person, actively tries to get closer to Takumi and even ends up bathing in a mixed bath. Takumi, who has given up on her, accepts that... However, the stimulation that washes your body is too strong for Takumi, a virgin, and it can't help but explode. Miki gently wraps around him, trembling with shame. And as a result, secret practice began in the bathroom with my stepmother...