Generally, eroge protagonists are spineless, useless, but honest and kind. Yuuri seemed to be like that. Then he got pissed off at Ameri for various things and yelled at her, and I mean REALLY yelled at her. He accused her of of always being capricious and shifting meaningless anger on to others, then called her less than human (which is a somewhat more common and personal insult in Chinese, although I’m not sure about Japanese).
Generally, I don’t really like characters like Ameri (genki, straightforward about everything but the fact that she likes the guy), but this time I’m completely on her side. Yuuri has his frustrations, and Ameri made a few mistakes, but geez there was no reason to be such an ass. On the plus side, I’m interested now (you’re right, relentlessflame, it does pick up the pace).
P.S.: Ouryuu is pretty oranyan and quite cute. Although I wish they actually put some tension into his “scene”. The Chibi punching and the super deformed faces felt as out of place as Ayakashibito’s chibis.