At this time of the New Year, the word "あけました" generally means "（年が）明けました" - "(the New Year) began". But in this image it means "（服の中身を）開けました" - "opened (her dress)."

Ran, you did a good job.

That's Yukari who did that.

Oh, my gosh...!

B, but Ran herself did a good responce too...r...right?