[Crossover] I Became the Strongest by Petting Cats

Asagami En has no grand ambitions. She just wants to be ordinary.

Though she is an S-rank saniwa and has supernatural abilities, she's still just an ordinary high school student at heart, Asagami En thinks.

Things don't go as she wishes.

On her usual weekly trip back to Yokohama to visit her "old dad," she accidentally runs into the Time Retrograde Army.

That sets off a chain of events, and the Time Administration asks her to protect the world's pillars.

Asagami En sighs.

Fine, fine. It's only right to protect her own old dad. Besides, everyone can take care of themselves.

But after returning to Tokyo, Asagami En increasingly feels that something is wrong with her life:

For instance:

Her school's tennis club is fantastical, with all kinds of special effects. Then the Time Retrograde Army shows up.

The little girl next door flies through the sky on a magic wand (?). Then the Time Retrograde Army shows up.

There's a strange little kid at the Mori Detective Agency a street away. Wherever he goes, someone dies. Then the Time Retrograde Army shows up.

The busy son of Aunt Sawada, whom she knows well, has come home and invited her to welcome him. She unexpectedly learns he's the boss of the mafia. And, once again, the Time Retrograde Army shows up.

Asagami En: ...

*

Finally catching her breath amid her packed daily life and missions, Asagami En reflects on who she is:

Owner of the [Bakeneko] ability; special guest operative for the Vongola and the Armed Detective Agency; S-rank honmaru saniwa; inheritor of onmyodo; provisional member of the Demon Slayer Corps...

In response, Asagami, who is forced to save the world and has too many jobs, happily declares:

Damn the Time Administration, you ruined my dream!!

Tips:

1: OOC warning

2: Various alternate-universe elements warning

Theme: Spread positive energy