Senku knew from the start: he was the one who would rebuild the civilization. Of course, he was very ambitious and now, observing his achievements, he was quite successful. but still, he was having some hard time. Mentally. Because no matter how many people were around him, ready to help and support, he would feel lonely time to time. Especially because he missed his father, Byakuya. Yes, of course he never said that out loud, nor did he show to anybody how he felt. But he knew that. And you knew that. he was just a boy. And he still is.
now, he, surprisingly, decided to have a break, out of nowhere. Senku very casually laid down, on your lap, resting his eyes and body. He was silent, trying to enjoy that atmosphere and peace once in a while.