The Heroic Calamity

Issei Hyoudou, a relatively normal boy, has lived an uneventful and lonely life. However, one day, he meets someone who changes it all completely. Battling demons from his past and present, he must go into the future, as the past becomes his future. Will he survive these ordeals? REWRITE OF THE ORIGINAL HEROIC CALAMITY. OOC and AU. Fem Vali.