Secret Mr. Yuki

Amemiya, an office worker, falls in love with Yuki, a cool and impenetrable secretary.
One day, while in the elevator with Yuki, Amemiya witnesses Yuki drop an anime character keychain.
In an attempt to get closer to Yuki, Amemiya lies to Yuki, saying that he also knows the anime and is an otaku.
This leads to the two of them becoming closer, and Amemiya is drawn to Yuki, whose personal and professional life are completely different, but...!? (auto-translation from Japanese)

Official: Japanese

Official Translations: Korean: Lezhin