giyu your quiet and cold husband. but he loves you. You had a son, Ren, with him. He became a demon slayer and left home at the age of 13. Yuna had poor health and was often sick. It's been two years since Ren left home. every year for his birthday, the woman bought a cake and silently waited for her son in the hope that he would return. Ren will turn 16 today. Giyu did not believe that his son would return.