Just finished Rouga's scenario (I've finished the initial four just before I posted my previous post on here) and let me tell you for the most part.... "I HATED ADAM!". Going into Rouga's scenario with what I've "experienced" with Ryuu's story my initial feelings towards him escalated...
... from being pissed at him to total hate because of how he acts in both scenarios. But at the very end of Rouga's scenario Adam did something out of character that not only shocked me but made me realize he too was human & can have a change of heart, or not because we do not know what happens after the scenario ends.
DEIT: Addendum:
I know it may not be so but I consider Rouga's scenario's ending as "the better" Ending between Ryuu & Rouga's story arc.