So, what's the score of this hand? I can see a Riichi, and I guess this is a Big Four Wind.

The riichi isn't particularly relevant since this is a yakuman level hand anyway. Big Four Winds is a 16,000 point hand, depending on ruleset. Total payout is 4x hand value or 6x hand value if Koromo is dealer. Best case scenario is a double yakuman as dealer for 96,000 points.

Suu ankou, dai suu shi, and tsou ii sou. Depending on the ruleset, it's either a triple or a quadruple yakuman. 96,000/128,000 for nondealer or 144,000/192,000 for dealer.

So, Big Four Winds, Four Concealed Triplets, All Honors.

Goddamn Saki characters and their power of luck manipulation.

Knowing her, this should be a Haitei Raoyue too.

Astana said:
Knowing her, this should be a Haitei Raoyue too.

Considering the moon is in the background I'd say you're right.