Why everyone is so pessimistic ? Like, let her time to process what happen. She was tressing about confessing and got kiss all of a sudden. Of course she be shocked and have a hard time to process what happen.
Yeah, it seems illogical but I think I understand why Tsukushi reacted like this. They're both young and Tsukushi is pretty much the worse communicator of the two, it's taken her so long to figure out her feelings and muster up the courage to confess even with moral support. She was expecting to get rejected, like REALLY expecting it, she's very pessimistic herself if you reread the last couple chapters before they kissed. She was so prepared for failure that she doesn't know what to do now that Hinoka seemingly returns her feelings, she's just confused and shocked. I actually think it's very human of her to react this way instead of go all out sunshine and butterflies from now on