From the source tweet and own reply:
Alice: "So, if you want to do something...go ahead?"
Marisa: "Heh?"
"But you call me outta here first, so you go ahead."
Alice: "Later than you. Reimu can witness for me."
Marisa: "No, I'm late ze~☆”
"Right, Reimu?"
Alice/Marisa :*stare at Reimu*
Reimu: "Huh...Errrr...."
"Can I go home?"