Otameshi to wa Ie, Suki Sugiru

Hiroki Okami works at a drugstore, and Shintaro Takimoto is a young man who visits the store at the same time every day. Their short talks was a secret pleasure for Hiroki at work. One day, Shintaro confides in Hiroki, “I don’t have the courage to confess to the person I like.” In turn, Hiroki encourages him, “It’ll be fine, you're so attractive.” That was when Shintaro suddenly confesses, “The one I like is Okami-san!?"

(Source: Libre, translated)

Note: Includes an extra chapter.