Friend please look at the Izaya-Hasegawa fanfic in more detail, I recommend that you do like him and put longer interactions since they are very short and direct, in addition try to put more thoughts of Kiyotaka, and please do chapters of tranquility also and do not advance so fast to the story. I tell you as a recommendation since I love your fanfic, and if you don't want Kiyotaka to be so similar to Izaya-Hasegawa's fanfic, just make Kiyotaka go koenji style. And finally due to the popularity of Kiyotaka make interactions with senpais.