Honestly, I hate the brother. I haven't finished this one yet, but I liked the main characters since the beggining. It was nice that Itsuki is able to convey his feelings in a clear way and doesn't take millions of years realizing that, but oh God, I freaking hate his brother.
The live triangle thing is so bothersome, and the most annoying part of this one is how little respect he has over his brother's feelings or Chitose's one: dude, they are in a relationship, you were rejected, get off. And also, thr fact that Chitose it's not actively asking for respect or at least straight telling him "Emm sure you may like me, but please stop bothering me or my boyfriend, you already know my response" UGHHHH. IT'S BOTHERSOME, SO BOTHERSOOOMEEEE.
But, the whole art part and slice of life thing is interesting really, the characters develop and found new things and goals, and overall, the main couple actually communicates so that's nice.