I Dont Know Which Is Love (Manga) Vol 01 (Mature)

With high school graduation approaching, Mei Soraike tries to confess her love to her best friend for whom she had long harbored a secret crush...only for her hopes to be crushed. But a little heartbreak is fine-because she'll absolutely, definitely, without a doubt get a girlfriend in college! And no sooner does Mei set her resolve than potential prospects start sidling up to her one by one...?! Yen Press
(W/A) Oku Tamamushi