This drama tells the story of Rion, a high school teacher of Generation Z who devotes herself to the education field with dreams and hopes. However, the cruelty is beyond imagination. In the second year of work, she lives a stressful life every day and even wants to quit. Students who expand the interpretation of "freedom", parents and neighbors who have excessive expectations of the school, and older teachers who push the responsibility of handling disputes to young people... Rion writes these complaints on SNS and confides in her gentle boyfriend, "Teachers are also human beings!" While venting moderately, she barely maintains a balance with her natural vitality and cheerfulness. However, Rion suddenly became the head teacher of a senior high school student. What is her fate...