[Anime Crossover] Something's Not Quite Right with Yagyu's Little Sister

Please read the warnings before starting. I’m writing for love, so updates are irregular, but I won’t abandon the story.

*

Hello, everyone. I’m Yagyu Yuki, an ordinary elementary school student.

Aside from being physically fragile, my life is peaceful and lovely.

That is, until one day,

when I saw my rational, gentlemanly older brother shout things like "bonds" and "no blind spots," then shoot out a beam of light with a "whoosh" (not really).

My worldview... collapsed.

Haha, it’s fine, it’s fine.

He’s just playing ordinary tennis. Everything is perfectly normal.

*

No, I spoke too soon.

There really is something wrong with this world, isn’t there?

Watching my classmates fly through the sky in bizarre outfits, and the police officers driving their cars up into the sky, I couldn’t help but wonder, even as a top student.

*

One day after Yagyu Yuki joined the Guardians,

after school, Yagyu Yuki and her companions were in the middle of enthusiastically purifying villains

when they ran into her older brother, Yagyu Hiroshi, and his companions.

Yagyu Yuki (dressed in a bizarre outfit, striking poses at thin air):

"Big brother, if I tell you I’m cosplaying, will you believe me?"

Yagyu Hiroshi: ...

*

Many years later,

Yagyu Yuki had grown used to tennis that came with flames and knocked people unconscious, and to the bizarre murder cases that kept happening in Beika Town.

Then one day, while on a date with her boyfriend, she saw tennis being played with such force that it was truly "earth-shattering."

She completely lost it all over again.

"Weren’t sports anime supposed to have no deaths?!"

The people from the tennis murder series: "Huh? Me?"

Reader's Guide:

1. Written in third person.

2. The heroine is a native of this world, not a transmigrator or someone reborn, and she doesn’t know the plot.

3. Breaks up the Nagi and Ruri pairing.

4. No canon pairings; everyone is platonic. (What do elementary schoolers know about romance? I'm judging you.)

5. OOC story, lots of authorial worldbuilding, chaotic timeline, a renaissance.

6. A fan of happy endings (everyone gets to dodge the death flags).

7. Rikkai has a sixteen-match winning streak and has won the national championship three years in a row.

Theme: Dreams are the compass of life, guiding us across the sea of confusion.