This was one thing that Gen didn't play around and pretend to disobey - he flexed his foot and wiggled his toes for Senku, winking.

"I don't feel anything pinching, my dear - I'll let you know if it feels like it'll slip and become unintentionally tight," Gen hummed, and actually, that was a good point. "I'll tell you to pause if I notice something strange, hmm?"