Mukatsuku Aitsu ni Naderaretai.

Yuzuki, a gay office worker with a severe hand fetish, has a colleague with whom he just can't get along. He is Ayase, the star of the sales department, who's a serious and considerate man, but a jerk to Yuzuki. Yuzuki is working hard at his job, but one morning he collapses at work, and the person who takes care of him is none other than Ayase! And when Ayase's hand touches Yuzuki's body, he feels a pleasure he's never felt before...! (Source: Splush, translated) Note: Includes extra chapters.