Okay hear me out…
daemon/soulmate au where Gi-hun and In-ho have animals that represent their soulmates except instead of anything normal,
Gi-hun’s is a goldfish and In-ho’s is a squid.
And Gi-hun has to carry the goldfish around in his pocket because it has no water to swim in.
And In-ho’s squid keeps trying to wrap its legs around Gi-hun 24/7.