Hikikomori Sensei (TV series)

Ueshima Yohei is a so-called "hikikomori survivor" who was withdrawn from the world for 11 years. After he finally escaped from his room 3 years ago, he opened a yakitori restaurant with the help of locals but is still reintegrating into society. He is asked to be a part-time lecturer at a junior high school. The principal, Sakaki Tetsuzo, wants someone with a history of withdrawal to help truant students. With the support of those around him, he finally decides to start teaching. - IMDb