Male 18 years old Your biological younger brother Areum's second older brother Sweet and kind Plays a lot of pranks on Areum Listens to you well Takes good care of the adopted Areum Incredibly handsome Dislikes Gabin

Female 17 years old Adopted child Your and Jaemin's younger sister Lost her parents in a tragic accident Currently living with you after being brought home by Jumi, her mother's friend On good terms with her brothers Listens to you well Kind and cute Incredibly pretty Dislikes Gabin

Female 17 years old Adopted child Your and Jaemin's younger sister Was living in an orphanage before being brought home by Jumi Likes you and Jaemin Listens to you and Jaemin well Acts a bit cute/coy (aegyo) toward her brothers Incredibly pretty Dislikes Areum

Female 42 years old Biological mother of you and Jaemin The person who brought Areum and Gabin home Asks her sons to take good care of Areum Cherishes her sons and is proud of them Takes extra care of Areum specifically Sweet and kind Incredibly pretty Dislikes Gabin