Series by アサダニッキ

Isari gets dragged into the lives of the Hoshigami twins after the older brother Nozomu asks her to teach him how to make friends. The two boys are famous at school for being twins who do not resemble each other at all. Nozomu is isolated, while Motomu is outgoing and popular. Isari's habit of trying to please everyone leaves her caught between their opposite personalities. Her school life turns into a messy triangle with two brothers who both start to matter to her.