Just figured out that he's the step father of Ri Koyu. His personal decision for his step child had made misunderstood among other officials and give much pressure to Koyu. Freedom, is the best thing for Koyu that Reishin would to give. But, people thought Koyu get the freedom as chance that not given. Most people know Ko clan as luxury clan, and it must be lucky for Koyu to be adopted by one of Ko clan's member, more luky, it's Reishin, one of the son of main member to be the successor of Ko Clan. That's what civil thought. Inside those "elite life", actually being Ko Clan succesor isn't pleasent at all. Even the first son refused to continue the clan. Then, the other brother, Kuro Ko, take his position as fate. Reishin himself didn't want to became successor, even he became one, he don't want Koyu to be successor. That's the reason, why he didn't gave Koyu name of Ko. But, he haven't heard that Kuro Ko trying to arrange wedding for Koyu and Shirley,