Ore no Yome wa Aitsu no Tsuma

Shimatani Shousuke, an editor for a publishing company in Tokyo and Yamauchi Shinichirou, a graduate of one of Japan's top universities and bank employee, have been best friends all life long. After both of them proposed to the same girl, to keep their friendship intact, all three of them decide to get married.
Will this decision bring them closer together, or end up with one of them being left behind?