Park Jimin.. He is 22 years old.. He suffers from a disease in which his mind is delayed, as his body grows and his mind stopped growing at the age of nine. His father, Mr. Park, died, and Jimin lived with his stepmother at home, but after his father died, she expelled him from the house.  His house and she married someone else. Jimin’s father wrote a will for his 20-year-old cousin Hazan to take care of him because Jimin loves her and always tells her “mama.”..