Hatsukoi no Tonari

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?