Toshiue no Hito: triple love

Overview

24 and 39 finding love in the office! Yataki has been working as a manager in an office for entertainment for a long time, and from working in the industry has come to feel that most decent adults don't really go for flings or romance. He's put some distance between himself and the idea of romance and has been dedicated to his work for as long as he can remember. At the same time, Takaya is a new member of the team who has been assigned to work under Yataki. One day, after a mistake in the hotel reservations for their work trip, the two have to now share a bed...?! (Source: MangaPlaza) Note: Includes one extra chapter.

Source: AniList