♂ m

The protagonist. His father remarries and he finds himself with a new mother and 3 step sisters. Despite how she looks somehow Tsubame is older than he is. After his father has been married for awhile and he's settled into his new family life he discovers that his step mother is in fact a succubus. ... read more

The protagonist. His father remarries and he finds himself with a new mother and 3 step sisters. Despite how she looks somehow Tsubame is older than he is. After his father has been married for awhile and he's settled into his new family life he discovers that his step mother is in fact a succubus. It turns out all his sisters are succubi too. They need to have sex frequently in order to become adults but he doesn't want to have sex with them because he's not a lolicon.

♀ f

Koruri, Chidori and Tsubame's cousin and the twins' classmate. She yells at Jun for being a pervert quite often and gets upset at his indecent relationship with his step sisters.

♀ f

Koruri's younger twin sister. She's much more athletic than her sisters Koruri and Tsubame. She loves playing sports and spending time outdoors. Her eyes turn red when she turns into her succubus form.

♀ f

Chidori's elder twin sister. She's more polite and studious than her younger sister Chidori. She's normally reserved although she has no problem declaring to the class that she wishes to commit incest with her brother. Her eyes turn red when in her succubus form.

♀ f

Elder sister of the twins Chidori and Koruri when Jun's father marries her mother she becomes his elder sister as well. She helps explain to Jun how to treat succubi through sex. As a teacher she helps Jun find places around the school grounds where he can have sex with her sisters without being cau... read more

Elder sister of the twins Chidori and Koruri when Jun's father marries her mother she becomes his elder sister as well. She helps explain to Jun how to treat succubi through sex. As a teacher she helps Jun find places around the school grounds where he can have sex with her sisters without being caught. Her eyes turn red when in her succubus form.

♀ f

She looks like a man and she sounds like a man. A fellow teacher, she's Jun and Tsubame's coworker. She often has advice for Jun on how to be a great teacher. She enjoys writing poetry.