Actress Han Ye Seul, TV Series "20th Century Boy and Girl" teaser released.

* I.O.I former member gugudan MiNa playing high school version of main character.

* Actor Kim JiSuk also stars.

* Motto "our 20th century that began in the 21st century"

* From the writer of "Reply"

* PD of 'Queen's Classroom' korean vers.

* Taking over time slot of previously broadcasted "The King in Love"