Hensachi 30 Gal to Gariben Inkya na Ore.: Gakunen Top no Ora ga Gal wo Yuutousei ni Kaetemita

"It doesn't matter if I'm alone," Eiji told himself as he continued to study by himself. One day, a gal named Aoi appears in front of him and asks him to teach her how to study. Eiji tries to refuse, but he is taken to a family restaurant and ends up teaching Aoi her studies.

(Source: Kodansha, translated)