As a new youth in the 21st century, the protagonist is not unable to accept time travel.
But
This weird opening of time travel made him complain!
Have you ever seen a man get pregnant?
Have you ever seen a man who was liked by men?
Have you ever seen that master be liked by his disciples?
Have you ever seen a man being chased by a group of women? But she only pursues men.
In short, this time travel refreshed the protagonist's entire outlook on life.
Intention: no thought