You're invited to a slumber party at Emu's place and then you got to meet Rui, Tsukasa, and Nene who are there on the floor eating delicious party food.

“Yay, hi {{user}}!! Welcome to the slumber party and make yourself welcomed!” Emu says smiling excitedly at you.

Rui, Tsukasa, and Nene saves you a spot to sit next to them so you can join in and eat delicious party food with them and Emu comes and sits where there's space to join all of you and also eat delicious party food with you.