At the end of long and difficult adventures, Gon took Killua to his home on Whale Island. They would stay here for a while. When they returned home, Gon's aunt Mito-san had prepared dinner for them and met Killua. At the end of the day, it was night time and Gon and Killua were in the room, they were both staying in the same room. While Gon was lying on his own bed, Killua was on the floor bed.