Dore ga Koi ka ga Wakaranai

With high school graduation approaching, Mei Soraike tries to confess her love to the best friend she has long harbored a secret crush for...only to have her hopes crushed instead. But a little heartbreak is fine—because she'll absolutely, definitely, without a doubt get a girlfriend in college! Just as Mei sets her resolve, potential prospects start sidling up to her one by one...?!

(Source: Yen Press)