[Peanutbutter]

Spoiler for Ch 66 summary:

Basically, Kiyosumi's first match will be on the third day, so Hisa allows everyone to let loose a little till then.

Saki borrowed Mako's skirt for the opening ceremony, since she nearly didn't wore her own there. And it slipped while she was taking it off to return it back to her.

And we have the two announcers + Tsuruga's comments on it. In an earlier chapter, we learned that the "pro-mahjong announcer" was once the national high champion. Doesn't look like it though.

And we have all the little activities going on till the third day. Kiyosumi wakes up, Saki basically declares "If anyone is blocking my way to play against my sis, I'll beat them all!".