♂ m

The protagonist. A researcher who managed to create an aphrodisiac while experimenting on hormone secretion. He often gets called to teach at the school his step daughters attend. After an accident where he was exposed to certain chemicals he became sexually impotent for a while, but regains it aft... read more

The protagonist. A researcher who managed to create an aphrodisiac while experimenting on hormone secretion. He often gets called to teach at the school his step daughters attend. After an accident where he was exposed to certain chemicals he became sexually impotent for a while, but regains it after seeing Airi and Marina. Soon after this he realized that he only gets aroused by younger girls, and he decides to marry Airi and Marina's mother in order to get closer to them.

♀ f

A third-year student at Seifu Academy. The older sister. A virgin. She’s a studious, reserved, and serious girl. She’s half-French with strong Japanese heritage, but she has quite large breasts. She helps her mother with household chores. She’s been dating her boyfriend for a year, but it seems they... read more

A third-year student at Seifu Academy. The older sister. A virgin. She’s a studious, reserved, and serious girl. She’s half-French with strong Japanese heritage, but she has quite large breasts. She helps her mother with household chores. She’s been dating her boyfriend for a year, but it seems they haven’t had sex yet. However, they’ve apparently promised to have sex after her midterms, and because of her serious nature, she’s feeling conflicted. She wants to support her mother and father.