NATSUKA goes to Mitsuki's cousin's house whenever possible. NATSUKA, an only child, admires Mitsuki like an older sister. I'm going to Mitsuki's house again today. Recently, my mother remarried, but the remarriage partner came to touch NATSUKA and became distrustful of men. While consulting with Mitsuki, it eventually becomes a forbidden relationship ... "Women can have sex too, right?"