Manga Like How to melt

Yukimi is the art director for a dating-sim at a game production company, even though he does not believe in “eternal love” or “happy endings.” One day, the team's main illustrator is out sick, and Mebuki, a junior member of another team, comes over to help out. Yukimi thought that the only connection between them was that they went to the same school, but suddenly Mebuki asks him, "So, are you available?" This is a melty love story between a single-minded younger man and the handsome art director who is distrustful of love! (Source: Homesha, translated) Note: Includes one extra chapter.