霊夢「アンタ私の恵方巻き食べたでしょ？」
萃香「違っ・・・食べてない食べてない勇儀がー」

Reimu: My ehoumaki. You were the one who are it, weren't you.
Suika: Nh! It was Yuugi! It was Yuugi! She ate it!

Note: Ehoumaki: A lucky sushi roll normally eaten at Setsubun.

More info:
http://justhungry.com/ehou-maki-lucky-long-sushi-roll-setsubun-no-hi

removing the yuri tag. also, is suika peeing herself? and thirdly, is that a rotten fish head Reimu's holding?

This is what happens when you keep Reimu up all night while drinking sake.