Why Are You That Strong, Yankumi?

Yankumi, among her students, ah how I really admire you sensei..

Students: "why are you that strong?".

Yankumi: "because I want to protect everyone important for me"
(This is one scene from 'Gokusen', my most favorite dorama, happened after yankumi, a teacher, saved the students from some culprits who beated them)
Well, I want to be strong like Yankumi.. Then everyone, let's be strong! :)