Based on the erotic game by Lune. 
 
The protagonist - Yuuichi - fails the entrance exam and is currently attending prep school. 
Around this time, his father, who is almost never home, remarries and his family gains new members. 
 
The mature and alluring mother - Mifuyu, her gyaru eldest daughter - Natsuki, and subdued second daughter - Akiha. 
Yuuichi wants to welcome the new family, but living together with 3 women is too titillating. 
Together with the stress of examinations, it becomes impossible to suppress his libido. 
 
And then, a mysterious package arrives. Inside is a strange penlight that has the ability to put anyone under hypnosis. 
But it can't make people do things that they don't want. 
Thus, Yuuchi first begins with "getting along as a family", and gradually, the orders become more extreme. 
 
Moreover, he wants the women to bear his child in order to become a real family. 
Additionally, the mother daughters trio, filled with carnal desires, also begins to seek for more pleasure... 
 
(Source: Visual Novel Database)

Based on the erotic game by Lune. 
 
It has been a few days since the protagonist received the hypnotic penlight and began venting his desire on the women in the family. 
 
However, some rumors have started: "That family is doing something suspicious..." 
The Mamiya family, which was given the cold shoulder​ by the whole town, is going to be forced to leave. 
 
While being caught in a dilemma, Yuuichi noted that most of the wives in town are sexually frustrated. 
"I want them to be in my 'family'." 
Thus, dark lust starts to cover the neighborhood, and even more hypnotic life begins...

Yuuichi Mamiya