He definitely perked up quite a bit when Tonbokiri told him he could continue. With his face pulling out of his shoulder, there was a certain spark of excitement in the younger Sword's eyes.

A part of him thought maybe he had ruined his chance to repay Tonbokiri for his kindness. He wouldn't have blamed the other man for saying no. Without realizing it, Izuminokami crossed a line he wasn't supposed to after all. (And he was terrible for wanting to do it again, but he'll refrain)

He gives Tonbokiri's shoulders a gentle squeeze before pulling back to resume his place behind him again, and once he's settled in place, he starts to comb out his hair again.