It is painted on gesso panel with acrylic paint and posca. As for the subject matter, I chose it because I thought it should be somewhat powerful. The design was inspired on the spot. The colors and patterns of the background are also quite nice. The colors are austere and worked out quite well. If there is a concept behind this painting, it is not to be too abstract, but to have a simple design, a simple composition, and to have an impact or a sense of presence when displayed. In reality, however, I just drew what I came up with. In reality, however, I just draw what comes to my mind, and there is no concept or message.