Also known as: 少女祈祷中, しょうじょきとうちゅう
The standard loading message on Touhou games (as rendered in English) is "Girls do their best now and are preparing. Please watch warmly until it is ready." It has given rise to a popular snowclone in Touhou images of "Girls are verbing" or "Girl is verbing" (and sometimes other substitutions, by the nature of snowclones.) Use this tag when the image contains this meme in its text, or text derived from this meme.
A more literal translation of the phrase into English would be "girls are praying".