Responses
As far as I remember, he did it infront of his father.
I think he did it to help Shirone get to magic school (because of pledging his oath to him, Shirone HAS to become someone great, or the son of their family has pledged his once-in-a-lifetime oath to someone unworthy)
Ahh, i see. I think i remember something lile that happening
Wait, it's been awhile.. did Rian really give his knight's oath to Shirone? I don't remember him doing it in the early chapters