Comment by MonsterUnderYourBed on Just someone from the universe

I won't spoil much:

Technically, some stuffs happen, Hyunjae's birthday party is technically ruined, they're all drenched, but Yoojin buys Hyunjae a convenience store cake and sings him a happy birthday song.

Then when they part, Hyunjae changes Yoojin's contact name in his phone from "My Item" to "My Partner" 

PARTNER