Mako-chan Kaihatsu Nikki 1

Makoto Himemiya is confessed by her childhood friend, Kaoru. She is so happy that she kisses him deeply for the first time. Makoto has a high sex drive and a strong interest in sex. Rather than suppressing it, she spent her days masturbating to sexually explicit videos. "I know what kind of woman you are, you know." The brother-in-law was seeing through such Makoto's circumstances...!?