"Hey, what does that mean?" Senku asked, sounding amused.

It was really, not hard to knock him over with a bit of leverage. Gen didn't have to be especially strong, mostly because he'd surprised Senku.

He couldn't tell offhand which of them had the better advantage physically, aside from the fact Gen had more stamina, but this was more strength.

He flailed a bit in surprise, trying to hit him with his pillow anyway.