Eun-Oh Nam, a member of the corporate organization Jin Hong-pa, was a spy planted by the rival organization Deok-un-pa, and was working to steal items managed by Jin Hong-pa to secure funds and manipulate the ledger. Then, at the order of the boss of Jin Hong-pa, he was given the task of spying on his daughter Cheon Hee-Min. Eun-Oh is bewildered by the existence of Hee-Min, who is unknown to the outside world, but soon faithfully carries out the assigned task. In a wide, dry room with no human smell, the two develop a strange bond behind the firmly closed front door. However, their deepening feelings shake their reason, and the two eventually make an irreversible choice...

(Source: Lezhin, translated)

Notes:
- The chapter count includes a prologue.
- Part of Lezhin's Gwanggong Collection (광공단편선).