I heard they do it behind your back but some players got lucky and caught them sitting on the bench/benches during the day. Is there a certain time for it or it's at random?
I think it's random. I saw Deidre sitting on the bench during the meteor shower last night.
It is random. I saw Fuchsia sitting on the yellow bench and she asked me to sit with her.
There is no certain time, it is completely random. Sometimes they will be asleep on the bench, as I have seen in my town.