2-dome no Koi no Hajimari wa

After being harshly dumped by his lover, Kousaka Yuuki, a shop manager at a restaurant, swore that he would never love again. One day he met his ex again who came to the store unexpectedly and it was completely exposed by Matsuoka, a kouhai at work, that he dated a guy. Kousaka was shaken that his past was known to Matsuoka, and that he would look down upon him, but Matsuoka forcibly kisses and says "I love you" to Kousaka...!?
(Source: Boys On Boys Love)