There’s a signing event in Bunkyoudo Bookstore in Shibuya, Tokyo on this Saturday (March 14) at 1pm.
The voucher for the signing event was given out randomly (I think) for those who pre-ordered the series’ volume 12 that went on sale on March 5.
The voucher or ticket for the event has been given out and you can only bring volume 12 to be signed by the mangaka. Nothing else can be given to the author to sign as well as no photography equipment allowed.
I’m not really sure about the certain details in the site, I can only say that the info is something like that. By the way, volume 12’s cover features Kaho-chan with Yunoki-senpai.
Oh yeah, this signing event is also on the same day as the Gakuin Sai 2, so people who got the ticket for the event and the festival must be in a dilemma…