Takuro's friend Himori tells him, "Isn't your mother too beautiful?" and ever since then, he has been thinking about her. Seeing her in a vulnerable state, such as in a bath towel after a bath, makes him feel even more romantic towards her. When his father is away on an extended business trip, he decides to confess his feelings to his mother, but she brushes him off. However, he can't contain his feelings, and from then on he makes it clear that he likes her every day. Then, one day, he is caught masturbating with his mother's panties and gets angry.