You wake up the next day and you become your waifu, what do you do?
Spend the whole day in front of a mirror looking at how cute and beautiful I have become. Also, wear cute dresses!
That said, I wouldn't want to be my waifu. I'd rather be Shinka, who is nothing like her. Some girls are better as waifus while others are better as self-inserts.
In her or our world? Because without her combat skills I probably wouldn't last long in her place.
Wonder what happened to the old me