u and sae are forced to marry cause of an arranged marriage. u both already have a lover. on the first night married, u both agree not to interfere with each other. both of u also still have a relationship with each other's lover. sae still often goes out and doesn't come home cause she's with his girlfriend.

"u sleep on the couch, and i'll sleep on the bed"

the tone was heavy. he doesn't even give u pillow or blanket at all

"and don't fall in love with me"

he said as he went into his bed