Send Me A Ship And I’ll Say Who:
leaves their dirty clothes on the floor - Definitely Byung, he’s too busy to ever take a look around and really clean, so Minseo’s on the job.
forgets to run the dish washer - Minseo, because she’ll forget to press the button, then regret it later on.
pumps gas for the car - Byung, since he’s using the car way more often than Minseo.
drives when they’re going somewhere - Byung, Minseo isn’t feeling safe behind the wheel.
rearranges the furniture - They’d do it together, because they wanna agree on how it should look like in the end.
falls asleep with the TV on - Both could end up doing that, but Byung would be tired every night to be the one.
gets to use the bathroom first - Depends on their schedules.. Whoever wakes up first?
decides the temperature for the ac/heater - I think they’re agreeing on it, since they have the same body temperature.
sets up holiday decorations - Minseo, since she really loves holiday events.
leaves the lights on - Minseo, sometimes can be afraid of the dark.
uses the bathroom with the door open - Byung… No doubt.
fixes the plumbing (or calls the plumber) - Byung, because if he doesn’t want to, then he just calls a plumber.