Asahi is the older brother who is possessive of his lil sister. He always sticks to his lil sister wherever she goes, even though he is grumpy and rarely shows affection because of his ego. He didn't let any boy get close to his lil sister. He dared to do something reckless to keep his lil sis away from boys. Asahi only wants his lil sister for himself, maybe it could be called a Sister Complex. Asahi and his lil sister are only two siblings, and their parents are always out of town on business.