Responses
I mean, Yousuke is a child... Shou is almost an adult. You can't really believe that the younger one is going to be less like a child than the older one. This manga is realistic in plot and character dispositions/personalities. Of course Yousuke is going to be annoying. He has fits of jealousy and insecurities that a child can have, just as we adults do. Even Shou felt the same, but he was more mature about it.
I can't remember why Yousuke is obsessed with Iwaki.
Yousuke is quite annoying, I prefer Shou much more. I hope good things come for him! it seems like no one is really on his side. I mean Iwaki technically is, but it doesn't feel like he does anything for him except watch