Ano Ko ni Koisuru Yamada ni Koishita

Miyu, Yamada, Akane are in a love triangle...? Miyu is in love for the first time. One day, Miyu saw Yamada, her classmate, kiss Akane-senpai!! But they're not going out, Senpai is in love with someone else?! But secretly, Yamada really likes Senpai. And Miyu can't seem to look away from Yamada...

(Source: Chibi Manga)