From Fantasyshrine:

Kirishima Kaoru, a representative of the Toudou Group in Japan, is the lover of Daigo Mikihisa, an executive of Mercury, a big corporation in America. One day, Daigo’s father, president of Mercury, orders his illegitimate son to be married to build a political alliance. What would the emotionally fragile Kaoru do when he finds out—?

A story of two men fighting for their love in the business world!

The series goes like this: