For ten years, Minami has been a dedicated educator, transferring from one troubled school to another, guiding countless delinquent students back onto the right path. Her experience and unwavering belief now lead her to a new challenge. Her current assignment is a school far more corrupt and dangerous than any she has faced before. Students gather in the streets to smoke, openly assault teachers—yet witnessing this chaos only ignites Minami's determination and sense of purpose. Amidst it all, her student, Nakano, is suddenly expelled indefinitely. Concerned, Minami visits Nakano's home, only to discover an unexpected connection that forces hidden secrets into the open, unraveling everything she has kept concealed.