What would happen if there was no Voldemort in this world?
James and Lily don't have to die and can accompany Harry to school;
Nor would the Longbottoms be regulars at St. Mungo's;
Quirrell and Barty Jr. Are still the same outstanding Hogwarts graduates;
Everything is fine, maybe the darkness is still surging, but there won't be so many broken homes and lives.
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Most likely there will be no main plot, just small stories in each unit, like an occasional peek into the magical world in a parallel world.
Warning: There may be some OOC. The author tried his best to restore it and tried not to dismantle any official version.
Intention: To have a dream