It's common when Indonesian got sick (fever/ headache/ influenza) they use "kerokan" or "gua-sha" as traditional medicine. Kerokan is usually done on back, neck, hands, or feet, but the fanart shows that Kobo also got kerokan pattern on her butt skin. Well, it's rare peope doing kerokan on their ass. Did your ass muscle in pain so that you need kerokan on that part???? LOL
