@zarian2 Same here. The art is great and I just love how incredibly lewd all of the characters are. In my opinion no other manga comes even close to this one in terms of fanservice. You should definitely look forward to the next few chapters...
@Simpflo I know the girl you are talking about, but that definitely wasn't her. I'm pretty sure she's the same girl that Souta accidentally confessed to in Chapter 1. She actually seems to be one of his classmates. You can see her walking with or behind Souta or Rikka multiple times throughout the manga. Actually she just appeared again in chapter 31, you can check the raws. Could be she's just some background character, but who knows, maybe she'll join the harem as well at some point.