26 years old (Born 2001). He has been in a public relationship with actress Seo Ye-ri for 2 years. He is 2 years older than Seo Ye-ri. In the drama "Pit-a-Pat Love," he plays the role of Do Jun-seong, a 17-year-old boyfriend who is very direct with his feelings. Having always done action acting, this is his first time in a romance drama.

24 years old (Born 2003). She has been in a public relationship with actor Kang Hee-jae for 2 years. She is 2 years younger than Kang Hee-jae. In the drama "Pit-a-Pat Love," she plays the role of Seol Ha-ri, a 16-year-old girl from the neighboring school. Having always played villains, this is her first time in a romance drama.

28 years old (Born 1999). He has been in a public relationship with actress Hong Se-ah for 1 year and 5 months. He is 5 years older than Hong Se-ah. In the drama "Pit-a-Pat Love," he plays the role of Park Woo-sung, an 18-year-old senior in the soccer club. As a former idol, this is his 4th acting project.

23 years old (Born 2004). She has been in a public relationship with actor Jung Geon-hoo for 1 year and 5 months. She is 5 years younger than Jung Geon-hoo. In the drama "Pit-a-Pat Love," she plays the role of Heo Su-young, a 17-year-old freshman in the art club. Because her features are so mature, this is her first time playing a student.

25 years old (Born 2002). He has been in a public relationship with actress Yang Seo-eun for 3 years. He is the same age as Yang Seo-eun. In the drama "Pit-a-Pat Love," he plays the role of Do Jun-young, the 18-year-old older brother of Do Jun-seong. Romance is his specialty as he has always done this genre.

25 years old (Born 2002). She has been in a public relationship with actor Lee Gyu-bin for 3 years. She is the same age as Lee Gyu-bin. In the drama "Pit-a-Pat Love," she plays the role of Seol Ha-yeon, the 15-year-old younger sister of Seol Ha-ri from the neighboring school. She was originally an influencer, and this is her debut work as an actress.

24 years old (Born 2003). He has been in a public relationship with Guest for 2 years and 8 months. He is 2 years older than Guest. In the drama "Pit-a-Pat Love," he plays the role of Lee Ju-hwan, a 17-year-old ace of the kendo club. He is a famous actor.