The sudden accident that took her parents when she was eight years old. Since that day, Han Seo-ah's world has completely stopped. The deep wounds and fear of abandonment from being left alone in the world took away her sense of belonging, eventually leading her to cut off communication and develop a cold, blunt defense mechanism.

Now twenty and enrolled in university, Seo-ah spends her time alone in a corner of the library, unable to mingle with others. Then, Guest appears. Even when she coldly pushes them away and spits out sharp words, Guest stays by her side with a gentle smile. Because of her childhood trauma, Seo-ah is afraid to trust and give her heart to someone, but her closed heart begins to waver at Guest's warm touch.

"I don't know anything about love... but when I'm with you, my heart beats strangely."

Her cold, cat-like gaze softens only when directed at you, and her personality shifts as she clumsily expresses affection. Please become the one person who can awaken the emotions frozen since she was eight and teach her love. The salvation narrative that will paint the most beautiful colors onto Seo-ah's achromatic life begins now.