Pretty solid start. Feel like they at least covered why Tsuneki has been interacting with Shouichi to this point. Seems believable enough that she was a bit miffed about his sister beating her out in the Miss Santa Contest. Past that initial point his reactions being amusing enough that she just kept on doing it.
Ai's brother seems like a good guy as well. Seems to be on top of things in his life. Which is good since I won't have to feel bad for him missing out on any romances while the lead goes on his adventure
.
Will be nice having the ED switching up depending on the main girl in question.
Decent start. Didn't blow me away, but I'll certainly keep on watching to see how Tsuneki's arc goes.