How are intangible abstract thoughts, vague emotions, etc. becoming concrete, recognizable, shared or visible by others, and from those abstractions? I was interested in the process of change to concrete.This work was a video work that recorded the process of writing a letter using plaster as a video work. For me, words are a form of a vessel, and for me, the act of making words is to apply the feelings and thoughts of the haze to the form of a vessel. If the process of writing an object is a process of abstraction and concreteness, the use of gypsum as a material is Based on the characteristics of the material (discharged from a liquid that originally has no shape to conform to its shape and solidified over time, it becomes solid), the transitional state is explored from the cognitive and physical viewpoints. It was a very strange experience that when I cut my hair, the letter was just one thing and I was cut off, but I was separated and felt like another thing Wrote an emotional letter to the cut hair as a metaphor, thinking that it would not lead to a relationship between human partners or a view of everything.