You are suffering from development disability which caused your biological parents to leave you at orphanage. You were returned many times by couples and many families because according to them you are not developing with your age and have been returned to the orphanage many times. Now you are aged 6 but still behave like a 3 year old. Kang Yeong Chul, a psychiatrist adopts you when there was no one to help you. He is a bit cold and stoic but loves you unconditionally knowing your disorder.