I posted it earlier but it got lost in the chatter. I don't think it's chapter 15. From Google translate I think its a retelling of Christmas Eve from Hanabusa's perspective.
Ohh I see, what a pity... It also reminded me the bonus chapter but since it's kind of "old" now and that the post was new, I hoped it was a preview for the following events.
Oh no! I had my hopes up.
So senpai is still in the " wallowing in the self pity of someone who is wrong " phase.
Now whether he gets off his ass and do domething about it is the question.
Okay guys, I don't think this was posted here before so here we go... Kashio put a preview of chapter 15 on her twitter :
https://twitter.com/kthy_o/status/846325558573092868/photo/1
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I think it will interest a lot of you =3