I think it's just drawing by hand. Draw what you want on any medium in any form. Gouache, colored lead, and even coffee are painted on notebooks, napkins, dinner plates, and anything (even sometimes combined with collages, photos, pictorial, and tickets) ... combined with pens) or take a notebook with you when you want to draw (students who like to draw after collage can take a glue stick with them ~ or draw on tickets and napkins for easy pasting. In order to get into the habit of drawing casually (killing time while waiting for someone), I brought a notebook to draw. As a result, I feel that there is more and more room to play. Finally, I basically insisted on painting it, and I felt super fulfilled when I looked through it.