サンタコスを楽しむ早苗さん。
はしゃぎすぎて、転んでびっしょり濡れて涙目の早苗さん。

Sanae Santa (flailing, then falling down)

Sanae-san enjoying her Santa costume.
Sanae-san was so excited that she fell down and got soaked and teary-eyed.