I Was Supposed to Return to the Apocalypse, So Why Did I End Up in a Period Novel?

Tian Yi spent five lonely years surviving in the apocalypse. He awakened a spatial ability, but his life remained lonely. When someone ambushed him, he chose to take them down with him. To his surprise, he returned to the time before the apocalypse. Using the valuables in his pocket dimension to buy supplies, he began preparing for the end of the world! But then the apocalypse he expected never came. Instead, he had returned to the 1970s, an era that was both open and conservative! See how he survives and makes a life for himself in an era he had only ever read about in books! He does all the things he never dared to do before, says all the things he never dared to say, and beats up all the people he never dared to hit! This story is pure nonsense. If anything seems familiar, then you must be pretty impressive!