Senku chuckles, if he does scratch him, he'd deserve it. It's not a big deal, he wouldn't see that as something unforgivable, even if Tsukasa would.

"Guess we'll find out. Even though I could use a good laugh." Senku smirks. He can be a brat when he wants to be. He looks relaxed though, he's not half as stressed as he was in the stone world.

His stress levels hit their peak before Ryusui took over and after that he's been less stressed than when he was in charge - but still busy and relentlessly relied upon. He doesn't mind, exactly, but the break hasn't been a bad thing. Whatever danger is in this world, he's openly not that worried about it.