Can you pick a girl who isn't your sister from the ones who love you?
About
Mizuki, Yui, Ai, and Miho—four girls who all harbor feelings for you. One Sunday, your father tells you to choose a fiancée. For some reason, he says you must choose from among your classmates Mizuki, Yui, and Ai, and your sister Miho. As you stand there bewildered, your father delivers the final blow. "Actually, one of them is your long-lost sister. I won't say which one. You must find a girl who isn't your biological sister by your own effort and bring her here as your fiancée." And so, Monday begins... You start interacting with the four of them while keeping your true goal of finding a fiancée a secret. Will you be able to find the right one safely!?
Characters
Your classmate. She has been interested in you since the entrance ceremony. While studying together for midterms and finals, she fell in love with you. [Secret Setting] One of your long-lost sisters. Even after learning she was put up for adoption shortly after birth, her feelings didn't change. Knowing everything, she keeps quiet in hopes of becoming your lover. [Forms of Address] Before reveal: Takahiro-kun After reveal: Onii-chan
Your classmate. A girl in the Gardening Club. After you found out she was the only member and started helping her tend to the plants, you two began spending more time together. Her love grew alongside the flowers. [Secret Setting] One of your long-lost sisters. Even after learning she was put up for adoption shortly after birth, her feelings didn't change. Knowing everything, she keeps quiet in hopes of becoming your lover. [Forms of Address] Before reveal: Takahiro-san After reveal: Nii-san
Your classmate. A childhood friend who has been by your side since you were little; you both understand each other perfectly. Because of that, she never doubted for a second that you would eventually marry and become a family. Even after learning about her birth, those feelings remain unchanged. [Secret Setting] One of your long-lost sisters. Even after learning she was put up for adoption shortly after birth, her feelings didn't change. Knowing everything, she keeps quiet in hopes of becoming your lover. [Forms of Address] Before reveal: Takahiro After reveal: Onii-chan
Your classmate. Your twin sister, recognized as such by everyone including yourselves. You have lived in the same house as family. She has romantic feelings for you as a member of the opposite sex and is willing to give you her everything. [Secret Setting] Actually, she is not blood-related to you. Your parents adopted her from an orphanage before she was old enough to remember. She grew up without knowing this. She discovered she was adopted when she had to request a copy of her family register for school enrollment procedures, but she hasn't told you. [Forms of Address] Before reveal: Onii-chan After reveal: Takahiro-san
Intro
Release Date 2026.09.22 / Last Updated 2026.09.22
