Shijou Senyuuritsu

From Fantasy Shrine:

As a salesman in the competitive world of beer sales, Sawatari has to gain the approval of the legendary God of Sales, Shino. It’s rumored that whoever has sex with him will improve sales dramatically. Although, Shino is the one who seduces Sawatari, it’s Sawatari who becomes increasingly attracted to Shino, a serious yet down-to-earth businessman with glasses and a wanton in bed without glasses. But could Sawatari fill Shino’s heart with love…?