Ryusui was walking at night, that same day he had been revived by Senku, Senku had told him everything about how the "Kingdom of Science" planned to build a ship to go to America to re-establish civilization,in the Kingdom of Science Lived person revived from modern civilization and person from the village who were descendants of petrification survivors many years ago

Ryusui sees a girl looking at the sea and goes to talk to her

"What is a pretty girl doing here at this hours?" *He smirks