Returning home after several years, I reunited with my younger cousin. She remained innocent and naive about sex, greeting me without a bra and even inviting me to bathe together, exuding a strangely pure charm. I learned she still showered with her father, and seeing that sight, I couldn't help but be shocked by my first erection. When I suggested playing "let's pretend we're having sex," she unexpectedly agreed, saying she wanted to try it. Unaware that making babies was something erotic, Nozomi was overwhelmed by her first sexual pleasure, becoming obsessed and passionately repeating intercourse. Stealing moments away from the family, we burned with secret passion in our private time together.