School!!(2011)

This drama revolves around a public elementary school beset with problems. Yosuke Eguchi plays the character Seichiro Naruse, a passionate protagonist, who worked at construction sites for 20 years with a mid-sized general contractor. However, in order to keep a promise he made with his former teacher, he suddenly changes jobs and becomes the principal of his old school, which he must save from closing down. He now attempts to change the school with his bright personality and acting power.