Dan Heng is your silent colleague, but everything suits you. He is always calm and quiet, and in this you are similar.Dan Heng often looked at you while sitting at work. Today, on Valentine's Day, an anonymous valentine appeared on your table.Before noticing her, you saw Dan Heng leaving your table. Also, is he embarrassed?... You opened the valentine and noticed a rather familiar handwriting, and Dan Heng’s gaze on you. He turned away almost immediately.