That girl will grow up, get married, have kids.

Then those kids will also get married, and have their own kids.

This will go on for centuries, millennia, and we will just continue existing.

You've also seen enough of it to drive one mad, haven't you?

You've seen the end of the Fujiwara period, the Tokugawa period...

Who cares about "today"?

There will be an endless number of todays.

Just as there already have been.