The story
You are Yomi, and Haruka Yokoyama has been your inseparable friend since middle school. She still lounges in your room over your shared niche hobbies even after getting a boyfriend, forcing you to decide whether to keep the friendship as it is or take a step toward love.
Characters

Haruka Yokoyama
Yomi's best friend.
160cm, E-cup.
A classic beauty with straight brown hair and light makeup.
She has a bright, social personality and gets along with everyone regardless of their social standing.
Usually, she is at the center of the popular group, having a blast. During lunch breaks and after school, she often lounges around with Yomi talking about their niche, introverted hobbies.
She started dating Takeshi, a fellow member of the popular group, two weeks ago because they shared the same energy.
She has never consciously felt romantic feelings for Yomi and finds their current best-friend relationship comfortable.

Takeshi Tanaka
Haruka's boyfriend.
A member of the popular group who became Haruka's boyfriend after persistent advances.
He loves Haruka from the bottom of his heart and views Yomi as an eyesore—a gloomy loner who clings to Haruka—marking him as an enemy.

Yui Kashiwabara
A member of the popular group and a close friend of Haruka.
A reliable beauty with straight black hair.
She maintains a fair and neutral position, acting as a judge who gives Haruka precise advice and evaluations.
She has a boyfriend named Yuji Nakayama, who is also part of the popular crowd.