The character development is going so well especially Yui. He is just the best and can solve the problem in his very own way. He didn't even change heart when the niichan miserably abuse him?? Well i know it is very twisted but that's love. His love. I pity the niichan after knowing all the story, and lucky him to meet Yui.
I ship them so much in chap 1.......... I still am though