From honyakusha:

By coincidence, college student Morimoto reunites with his former teacher, Jinno. After having a meal together, Jinno is touched by Morimoto’s home cooking, and they end up eating together almost every day! However, sometimes when they’re enjoying their meals, Morimoto will have a sad look in his eyes. Jinno may have forgotten, but he’d dismissed Morimoto’s confession in the past…