Seo Ji-hoon (actor)

Kim Seok-ju Cho Han-gyeol as young Kim Seok-ju

Kim Hwan

Jae-yoon

Cha Dong-jin

Lee Kang-min: a detective who was once engaged to Mok Sol-hee, who 3 years later after their breakup, transfers police stations in hopes of reconnecting.

Seok Jae-beom, a student of Class 4 in Yong-Tan High School, who is the son of a wealthy family. He recently woke up from a six-month coma, making him resit the year as a senior, and has lost all of his memories.

Lee Jae-sun, a man who was in relationship with Sol-ah until she realized his fear of cats. He went in a relationship with Lee Ru-bi. Jae-sun has somewhat a complicated relationship with his father. He is the first person to find out that Hong-jo is a cat who can turn into human from time to time.

Park Do-gyeom Ha Yi-ahn as Park Do-gyeom (child)

Lee Soo Cha Sung-je as young Lee Soo

Young Ha Myung-woo

Young Kang Shin-woo (18 years old)

Kim Geum/Immortal Daube/Bausae the woodcutter

Bae Joon-young