Kind of surprised at the complaints, by this point everyone should know what they're in for. There are lots of relationships in this series beyond Kasumi & Sakurako's, some of which are full on regular romance at this point. The main two's though is a different kind and that's ok, there are lots of different kinds beyond the typical seen in manga. Some people really just aren't that interested nor opposed, and that doesn't make them defective somehow. It's a quiet slice of life series about them slowly moving forward with their lives and how that evolves, and for once past the utterly typical school days which so many series stop at. If you're after some big End With A Period dramatic confession everything is changed this is probably the wrong place, though there looks to be some slow continuing evolution.