51400 Points

45600 Points

Riichi.

5/14 is Komeiji Koishi's Day! Wordplay from her first name where ko = 5, i = 1 and shi = 4.

13-Sided Wait

Onee-chan, you lack experience reading your opponents.

It looks like she has a Thirteen Orphans... But she declared riichi...

It's possible it's a junchan...

But it could also be a half flush with pin tiles...