Trapezium

The novel trapezium depicts the 10 years of Yuu Higashi, a high school girl, who aims to be an idol. To achieve her dream, she sets four rules for herself: she will not be active on social media, she will not have a boyfriend, she will not stand out in school, and she will make friends with beautiful girls from the north, south, east, and west.

(Source: Anime News Network, edited)