Unfortunate circumstances contrive to set up business student, Sahara, as his thesis advisor, Masaki's bedmate-without-benefits. Masaki seems to have been the victim of treachery which makes him unable to sleep. It takes some twisty logic to make Sahara comfortable with this set-up, until suddenly the "without benefits" part changes and sends him into another tailspin. Now there's a rival in the picture, and he doesn't even know this guy's a rival yet. Looks like this is a story about the "vibes" of honesty creating peace and calm and safety for sleeping, except it's yaoi, so of course that will include more.
Omae wa Hitsuji.