《It's 30 but it's still 17》Cast

Suffering from grief that he mistakenly killed Yu RuiLi, he shut himself away from real life for 13 years. It was to help Yu RuiLi's presence.

Yang Se-jong is a South Korean actor and model. He worked as a fashion model in 2011 for a short period. Yang is known for his role in the hit medical drama Romantic Doctor, Teacher Kim which marks his acting debut.

Shin Hye-sun (born August 31, 1989) is a South Korean actress. She made her debut in the television series School 2013 and acted her first protagonist role in My Golden Life (2017).

After 13 years in a coma due to an accident, she woke up at the age of 30, but her mind and memory remained at the age of 17 and she knew nothing about today's society.

Shin Hye-sun (born August 31, 1989) is a South Korean actress. She made her debut in the television series School 2013 and acted her first protagonist role in My Golden Life (2017).

Ahn Hyo-seop (born April 17, 1995) is a South Korean actor and singer. He is a member of South Korean actor boy band One o One.