Ken grins at that, taking the lube with one hand while the other removes the cartridge from his mouth and tucks it away. His appearance reverts to his slightly-less-feral look, right before he crowds Chikusa up against the wall and nips sharply at his neck with canines that, even in his arguably human form, seem sharper than strictly normal or necessary.

"You're such a pain, byon." It's hard to tell if Ken's referring to having to take out his cartridge, or just today's events in general. Either way, isn't that Chikusa's line?