Touken where they kiss and one of them starts to bite their neck and it starts to leave marks --
“Ouch! Kaneki! What the hell
— ”, Touka hiss, touching her neck, furrowing her eyebrows.
“S—sorry. I’m really sorry, Touka-chan.”, his face slowly turns red when he realize what he just did.
“Why did you bite me? It hurts.”
“Err—I just—you smell so delicious and—I didn’t know what I’m doing. I’m really sorry.”
Touka stare at him, and slowly leans closer to him. Kaneki almost choke when he feel her hands pulling his shirt down, exposing his shoulder, “W—what are you doing, Touka-chan—”
“Payback.”, a small groans slips out from his mouth as her teeth sank on his shoulder, bruising his skin with bite marks.
They tried to avoid Nishiki the next day when he ask why both of them have a bandage on their neck.