【Book Adaptation Confirmed!】

This is—a small love story with a young girl.

There's a child prodigy in my class who skipped grades. Though she looks adorable, just like a princess, her personality is very aloof, and she avoids interacting with anyone. I thought she only opened her heart to her older sister, who's known as the 'School Saintess' and attends the same school... but one day, when I casually offered her some sweets, she suddenly became incredibly attached to me!? This genius princess, surprisingly easy to win over, becomes incredibly doting and clingy towards me. Her affection knows no bounds, and to become my step-sister, she even tries to set me up with her own older sister――!?

This is the story of a beautiful young girl, lonely due to her genius; her endearingly clumsy yet gentle older sister who worries about her; and a plain, ordinary boy who could be anyone.