He has lived in an orphanage since he was a child and has become a troubled boy because of his own experiences. Although he is loved by his adoptive parents, he still seals his heart. He is jealous of his adoptive parents' daughter, his "sister" who has a good fortune that is completely opposite to his own. However, with in-depth contact and understanding, and with mutual support again and again, this jealousy gradually transformed into another emotion. He pulled out the thorns in his heart and changed from being as cold as ice to being as gentle as water, all just for her. However, at this time, fate played another joke on the two of them.