Junai Dissonance, a gripping melodrama about an unorthodox teacher named Masaki Nitta (Yuta Nakajima) and a troubled student named Sae Izumi (Ai Yoshikawa) who meet under unusual circumstances and eventually become close.

A well-loved teacher named Yukino Kosaka (Miwako Kakei) suddenly asks Masaki if he would take over for her teaching duties while she goes on hiatus. She doesn't say why, but once Masaki starts at the school, he finds the other teachers very vague and stand-offish about why Kosaka would leave. He instantly feels something has happened, but cannot think of what it could be.

Teachers like Usui (Manami Higa) and Kagami (Hidekazu Mashima) keep it vague.
He finds out that the students, however, very much loved Kosaka, and are very worried about her departure. In particular, Sae confesses to Nitta that Miss Kosaka was the only adult she trusted.
She is very concerned about what may have happened to Kosaka, and is determined to go look for her. In the end Nitta agrees to help with her search, and it's here they get to know one another.In their personal lives, both Nitta and Izumi are having a hard time- Masaki is being pressured into taking over his overbearing Father’s business ( one he has no desire for) and Izumi herself has to deal with a scatterbrained Mother with abusive and thieving boyfriends.
Below: Father (Satoshi Jinbo) pressures his son.
Meanwhile Mother (Yasuko Tomita) makes daughter's life hell.

It is in the midst of this melee that the two connect and find solace in each other.
Individually, they've always felt detached and alone. But now they feel like there is someone who understands them.
Of course, a relationship like this between a teacher and Student is strictly prohibited and many go out of their way to make sure they stay far apart. But as the pressures become harder and harder, they have only each other to turn to....
A mesmerizing show so far, in particular Ai Yoshikawa is outstanding, (the fight with her Mom’s boyfriend had me on the edge of my seat!!!), this might be the best acting I’ve ever seen from her!So many facets to this show, so many intriguing storylines and at this point I still have no idea where it will all lead (though whoever did the synopsis for MyDramaList gave away some VERY HEAVY spoilers in their description, ACK!) and can’t wait to see more!