It wasn't intended as an invitation, but Suguru suspects that is how Satoru will take it, and she's curious to see what she'll do, since they are going off to their buses, not the hotel.

She mostly expects Satoru to chase her down in the dressing room, and when she emerges from her dressing room with no Satoru in sight, assumes they'll run into each other the next day, at their next venue. It doesn't occur to her that Satoru might sneak onto her bus until she's on the bus, staring at her tour mate as the driver starts to pull away. Satoru's bus has already left, she knows, since the convoy has already started; Suguru had been a little late getting to the bus, wanting to check in with the tour manager about some of the set pieces.

"In the habit of wandering into strange places, Satoru?" she asks, taking a seat on the couch, leaving some space between them.