Boy, with caution

Jang Gi U is a 32-year-old temporary high school teacher. Four years ago, he became the subject of an inappropriate rumor involving a student. As a result, he never took the teacher certification examination and has instead spent the years moving from one contract teaching position to another. Raised in a single-mother household, he grew up constantly hearing that he had to be someone with"no flaws in the eyes of others." He lives as a person who appears flawless, but his life feels dull and unremarkable. At least, that is what everyone says.

Synopsis from TMDB

Cast

Ryu Se-il

Jang Ki-woo

Ha Jung-hoon

Lee Hyun-jae

Lee Jung-chan

Kim Jeong-ha

Jeong Si-wan

Park Seong-won

Park Hong-joon

Young-moon

Bae Yeon-hee

Grandma

Yun Su-jin

Hyun-jong's Mother

Lim Soo-hyun

Cast and crew data from TMDB