Talk:Underground Treasure Chest 6/@comment-91.21.7.185-20161019133702/@comment-28150993-20161019175832

It's the UTC banner (see here). If you've had all the other Underground Treasure Chest backgrounds before, you'll get the version with 5 exclamation points and a nice looking red paper flower. If this is your first time, you'll get the version with 1 exclamation point, if it's your second time then you'll get the version with 2 exclamation points, and so on.

I think it's cute that they keep on pasting the exclamation points even when there's no more space in the paper. Especially if you imagine that each time they complete the event, the touken danshis take out this banner and ask the new kid to paste an exclamation point XD