I Don't Know Which Is Love, Vol. 1 — Oku Tamamushi

In her final days of high school, Mei Soraike tried to confess
her love to her best friend only to have her hopes crushed. A little heartbreak is fine, though -- because she'll absolutely, definitely, undoubtedly get a girlfriend in college! And as soon as Mei sets her resolve, potential paramours start aggressively sidling up to her one after another...! How on earth is she supposed to settle on someone when she's falling head over heels for every cutie she meets?