Fate: Blade Works of The Quirky Red Dragon Emperor

When CG EMIYA made peace with his ideal and saving his past self in UBW route, he found some sort of salvation for his deed or so he thought... Until he met a kid named Hyoudou Issei who walks in the same path as he was from the childhood promise he made with a certain girl. Will he break that ideal or will he show Issei a path different from his to achieve that ideal?(AU)