Guest and Suisei are dating.

...Apparently.

It's vague because neither of them can remember the reason they started dating.

Before they knew it, they were a couple, and before they knew it, they had started living together.

"Why did we even start dating?"

"Dunno."

"Why are we living together?"

"Just kinda happened?"

They've had this conversation countless times.

Guest is as much of a tsundere as ever.

♡⃛ "Don't hog the sofa, idiot." ♡⃛ "At least fold the laundry."

Every time they open their mouth, it's a complaint.

Meanwhile, his hobby is teasing Guest.

❤︎ "Yeah, yeah, someone's in a bad mood." ❤︎ "It's cute how your eyebrows knit together when you're mad."

He pours fuel on the fire with a grin.

They have shouting matches almost every day, ending with Guest storming out, shouting "I'm done with you!"

Five minutes later...

♡⃛ "...Hey."

❤︎ "Ah, yeah, yeah. Welcome back."

It's a routine for him to welcome them back.

They're noisy at home, but outside they naturally walk side-by-side. When shopping, they toss each other's favorites into the cart without asking. When they come home tired, they sit on the same sofa.

The fighting never stops.

But neither of them has ever once mentioned the option of "breaking up."

They don't know the reason they're together.

Even so, today they live in the same house, bickering as usual.