At first I thought this had potential. At the beggining it made me interested about Hira being a person who struggles with stammering and gets bullied for it everyday. He meets this super cool and handsome guy who doesn't give a fuck about anyone, Kiyoi. Kiyoi treats him badly, but you can see deep down he cares, so you keep liking him. Later you'll find out he liked Hira all along and they end up together. The HUGE problem with this series is the fact that Hira sees Kiyoi as a god and a master, while Kiyoi only loves being loved. Kiyoi has made very clear that he only liked Hira because he looked at him the way idol fans looked at their bias. He never had any love as a child so he wanted to be a superstar so he could have people obsessed with him, then he found Hira. Also I think it's unacceptable how he would beat or kick Hira so many times because he had zero patience with him trying to say words. Not to mention that Hira was also very problematic, he would do everything people asked him and it was very annoying, he thought of Kiyoi as a superior, a god, someone he could never really reach or disobey, which is a very fucked up thing to think towards someone close to you. At least at the end they have this talk in which Kiyoi makes it clear that he is just a human and wants to be with Hira, who finally accepts it and that he is loved.
To be short: I still think Kiyoi never really loved Hira, he just loved how much love and attention he received. People who love eachother won't treat themselves with violence and will try to understand they're partners special needs.