I See Your Face, Turned Away 1

One might call Hikari extraordinarily ordinary. One day, she takes up a new hobby—imagining what a romance would be like between her pretty friend Mari and the cute guy in their class, Ohtani. It's all in harmless fun, until the roles start to get tangled in Hikari's mind. Does she really have to be just the best friend in this love story? And just who is on Ohtani's mind when his eyes drift away…?

Volume 1 of the I See Your Face, Turned Away manga series by Rumi Ichinohe.