Mainichi Kun ga Ireba IInoni

Overview

When she misses the last train after a drinking party, the OL Haruyama ends up staying at her boss Yuki's place. His perfect appearance and work ethic made him popular among the female employees. Haruyama is disappointed that nothing happens that night, but the encounter leads her to help cook dinner for her boss every night. He usually doesn't show any expression on his face, but sometimes he smiles gently, and she can't take her eyes off of him...? Secret office love with a handsome boss. An intimate dinner that requires no words. (Source: Petit Princess, translated)

Source: AniList