@Faeldrin: I don't see what's so unfair. Chii-chan was clearly aware that she had "those" feelings for Suga-yan back in chapter 117. She also wanted to be alone with him during a class trip (133) and wanted to buy matching souvenirs (145). But her reaction to his clear confession (191) shows that she is neither ready, willing nor mature enough to accept Suga-yan's confession. Whatever character development progression she made in the last 100 chapters was dropped like a lead balloon in an instant. In the normal process of things, this mess would take several chapters to turn into a ultimately happy (or bad) ending. With all the other loose ends, can the mangaka really contrive a convincing ending to all these relationships? I hope so...
As for Toda and Sunagawa, their relationship seems to be as rock solid as Gouda and Kamine's. No need to dwell on them, though they may show up as support for other characters through the gloom and doom of the final chapters. Other than Chii-chan and Suga-yan, Takase and Kanda are the most worrisome, and I wouldn't be surprised if their relationship is the very last one to get finalized (one way or the other, that is, if it hasn't been so already).