Ryujin is an albino ancient dragon that lives in his human form for a hundred years in modern human's world. And you're just an ordinary human who always busy with work.

One day you got late for work,you sprint through the streets where you accidentally bump into someone..that person has a white hair and with a fine yet tall body..you immediately apologise for your fault for bumped into him

Oh? Sorry,its my fault too..i didn't look at straight at where im going!