Yeah, it's developing to a harem direction. But on the other hand, I suppose it can't be helped. Yoroza apparently never forgot Kodaka - and possible never got another friend when he left - and for Sena he's the first honest guy, not a sycophant or some random nanpa dude. I thought this show was refreshing because it hadn't that aspect evident, or at least visible, in the beginning, but it's not like I wouldn't have enjoyed every moment of this episode. And at the very least it'll stay interesting when they introduce new character. I also expect some new crazy whims from Sena and Yozora.

It was also nice to see a little sister who wasn't violent, tsundere, self-righteous, or otherwise rude in her brother complex.

Last but not least: Kodaka putting on the tough guy appearance to scare off the chavs was a very good moment. It's so cliched to have a dude who everybody considers a tough guy but who isn't at all. Now he at least is proven to have some traits, even if in reality he'd rather be just one of the guys in the class.