Boku wa Make shitemiru Koto ni Shita

Ichirou Maeda is a 38-year-old, single office worker. One day, Ichirou was shocked to see his exhausted face and sagging body, and decided to start make up! Looking up to Tama-chan, a girl who loves cosmetics that he met at a pharmacy as a "master," he learns about the importance of working for himself and the joy of makeup while making mistakes along the way.

(Source: Kodansha, translated)