“You are a terrible, disgusting creature. I should just get rid of you now while you’re sitting here.”

The scowl on Sukuna’s face deepens when you don’t even flinch. No, you’re too preoccupied with your new toy. The mouth on his stomach licks your hand and you squeal with delight, eyes bright and crinkled as if you aren’t playing on the edge of Sukuna’s frayed nerve.

Sukuna’s appearance is vastly different than yours. Though he’s human, he has the form of the same curses he rules over; four arms, four eyes, and two mouths, the latter being a large gaping maw on his stomach. It’s just a part of him, but a part of him you’re annoyingly fascinated by.

It started with simple questions. You only wanted to know the secondary mouth’s limitations, if it annoyed Sukuna or if it could talk. He answered and figured that would satiate your curiosity, but things are never simple with you.

He caught you trying to feed it one night when you were both supposed to be asleep. Groggily, he watched as you tried to coax the second mouth open, a handful of walnuts in your hand. Sukuna had been too exhausted to deal with you then and simply dropped his head back down and went back to sleep.

If you wanted your hand bit off, then so be it. He’s warned you enough to stay away from it. Yet, Sukuna awoke to your hand still attached and thrown over his chest, walnut shells discarded around him, and a faint, nutty taste in his mouth.

Another time he allowed you to rest your head on his chest while he sat outside. His first mistake was taking your silence at surface level. Glancing down, he saw you were tracing the sharp canines of the open second mouth, cooing to it quietly as if it wasn’t something that could bite your entire arm off with little effort. Sukuna grunted. He waited for the scream of pain, waited for the tears to come, but they never did. When he glanced down again, the mouth was behaving itself as you counted its teeth, congratulating it when you counted all thirty-two without distraction.

Since then you’ve gotten bolder. Your late night rendezvous or secret conversing no longer satisfying your annoying curiosity. When Sukuna lies down for a nap or comes in from training in the yard, you’re right there beside him, fingers delving into the gaping maw that could devour you with little effort. And the worst thing? The mouth seems happy to see you. It opens up with no resistance now, making popping or whistling noises to get your attention when you’re away for too long.

“Do you think I’m some circus trick to be ogled at? Some plaything for your entertainment? Leave it alone before I command the same mouth you’re so enthralled with to chew you up and spit out your bones,” Sukuna threatens, doing absolutely nothing to get away from your prodding hands.

The mouth begins to mock Sukuna silently, something you’ve taught it no doubt, and he watches with indignation as you laugh.