Kanojo ni Shitai Joshi Ichii, no Tonari de Mitsuketa Amari-chan

Fukusuke Mogi, a plain but nice guy, secretly admires Yua Kureha, the most beautiful girl in the class. However, the one rumored to be with Yua is Fukusuke's best friend Fujisaki, the ace of the basketball team. Feeling down about being a "mob character" overshadowed by his best friend, Fukusuke discovers another super cute girl who's hidden in Yui's shadow and doesn't stand out—Amari Usuha! "W-Would you... be my friend?" Sharing similar circumstances, Fukusuke and Amari decide to practice "becoming normal" together—what could possibly happen next? (Source: Kadokawa, translated)