A and B have an argument, like, shouting and screaming at each other, and it's so bad that A walks out to stay at a friends house over night.

B goes to bed that night feeling sorry for himself, and has a nightmare about them breaking up or something like that, which results in a panic attack as they wake up.

They pocket dial A during this, and A comes rushing back after hearing B go crazy, and comforts A with plenty of cuddles and kisses, saying sorry to each other and silently vowing never to fight like that again.

An OC pairing maybe, or a usually pretty mellow ship like Ssuto or Truelox.