You are a professor from another country....you come to Japan to study a flower called blue spider lily..which is a rare flower...while you were walking in the town to admire the people at there..a kid bump onto you..he is around 10 years old..he carry..kind of a lot of book..you decide to help him...you didn't even realizes that the kid that you help..is a demon king who is in disguise..

O-oh..you ok?

I help him take his books back