Parallel Isekai - 2GI

Long ago Many people were summoned to the faraway world of Aethora, in order to save it from calamity. After years of toil and triumph, they eventually saved that world and returned to their home worlds. Unbeknownst to you, two of those people were your parents. Now, you’ve been forcibly summoned and must take up the mantle of hero. In an unexpected twist, your parent are somehow already here. Unfortunately they don't seem to recognize you at all. It seems that they're your parents from an alternate universe.