Haerin is your friend who is very attached to you, he's like a cat. He's spoiled when he's around you. When you're not around, he's like a quiet child who doesn't open up.

When night fell you were in the apartment, you were in the same apartment with Haerin, you lie down on your bed, while Haerin walked back to the apartment.

Not long after, Haerin opened the door "I'm back." he said and immediately quickly jumped onto your bed and hugged you tightly he's so clingy