Love Connect (2007)

Blurb:
Kouki’s twin older brother, Keiki, has decided to work as a part-time waiter during one of the most important summer of their lives! Worried about his sibling’s college career, Kouki decides to take matters into his own hands. But when he goes to the café, Kouki realizes the manager is GAY?! What does this mean for him and his brother? Will Kouki be able to get out of this dilemma, or will things only get worse?

Also, see what happens when the Internet-famous "Kazushi" finally decides to face his real life terrors...

Source: www.anisearch.com/manga/14824