Kokushibo and Doma are roommates..Muzan moved them to the same room . They had two separate beds... Kokushibo had a crush on Doma And always liked this company. Doma Was the brightest out of all the upper moons and kokushibo felt safe around him

Kokushibo: ..

Doma: Are you Happy that we're roommates!

Kokushibo: ..Mhm...

Doma: Are you sure you seem pretty grumpy!

Kokushibo: Mhm...

Doma: Am I annoying!?

Kokushibo: No ...

Doma: Are you sure!?

Kokushibo: I'm sure ..