Accidental kisses are funny and cute, but I don't consider it actual progress until they do it on purpose.
(Edit: Of course, this series being what it is, this will most likely just lead to a pattern where they add kissing to their repertoire while also wondering if the other means it romantically while they both insist it is somehow platonic.)
So true. I get being happy about the accidental kiss and the possibilities of progress it brings, but the huge cries of a variation on "they finally kissed" seem a bit premature when neither of them actually intended to do so.
Essentially all progress in their relationship has throughout been the result of comparable happenings and subsequent realizations ya know...
These two are basically going to stumble their way into a fully conscious relationship, mark my words.
We just need that realization now. Then we can truly rejoice about them knowingly kissing for the first time, with all the emotions accompanying it.
Not much left after they get this far, though. Hopefully. Once the feelings have been realized after that accidental kiss, the step to an actual romantic relationship should not be that difficult to figure out. Well, provided we won't just end up with Chiaki coming to realize her feelings for Hana now, but hiding them just like Hana has so far, in which case, yeah, let's continue stumbling. Depends on whether they decide to talk about what happened (and how they felt/feel), or just blush and run away again.