When the strong and optimistic she meets him, who is cold on the outside and hot on the inside, when he misunderstands her, and when he gradually develops an inexplicable affection for her while she falls in love with another person, will their stable and peaceful life stay on the original track? Will they come together or separate and become the cinnabar mole in each other's heart and the moonlight in front of their bed? Where will the two of them go from here? Everything is unknown.