Anime Crossover: About How I Spoiled an Angel

Tokyo.
Inside an apartment building.
A handsome young man stood silently in front of the bathroom mirror.
Not long ago.
Unexplained memories flooded back like a tidal wave.
now.
He had completely absorbed the memories in his mind and realized that he was no longer in the same world.
There were no dump trucks that were popular.
There was no divine favor involved.