Onmyou Taisenki - Season 1 Episode 18 Fortress' Seal
Overview: Masaomi's bike gets a flat tire. A passerby on a motorcycle helps repair his wheel. As a way of showing his thanks, Masaomi gives the man a special coupon. It is revealed later that his name is Hayate Takamiya, a Toujinshi of the Chi-ryuu.