A Strawberry Became the World's Strongest, Surely Something Went Wrong?

1.

Meimeizi was an ordinary strawberry in the world of fruit. To repair her damaged mecha, she decided to go to the human world and gather materials.

But how could an innocent, naive strawberry know just how dangerous the human world was? Meimeizi had barely arrived before she was scammed and tricked by some unknown System into signing all kinds of unfair contracts.

All she needed to do was gather materials to repair her mecha and go home. Now, though, the difficulty of her mission had shot up by at least four levels. The unknown System ordered her to become the strongest in the world and annihilate everyone on the day her three-year deadline was up!

Meimeizi: ...?

Are you sure you haven't made a mistake by asking a strawberry to become the strongest in the human world?

2.

On its first day on Earth, System A3111 bound itself to a strawberry. To help her become the strongest in the world, it decided to use every bit of its intelligence.

First, System A3111 decided to give the strawberry an identity and family of supreme status:

The biological daughter of Zenin Naobito, head of the Zenin family, one of the three ancient families with thousands of years of history in the jujutsu world (√)

The long-lost biological daughter recently found by the dead former leader of Port Mafia, the head organization of Yokohama's underground powers (√)

The unrelated younger sister of the tenth-generation boss of the Vongola family, the leading force in the underworld (√)

Meimeizi: ? Why isn't the last one his biological daughter?

[Can't be helped,] System A3111 said, looking glum. [He's only fourteen. He's protected by the law safeguarding minors.]

Meimeizi: ? What about me?

System A3111: [You're an underage strawberry, not a minor.]

Next, System A3111 decided to give the strawberry a cool, alluring appearance, radiating elegance and nobility:

Long-haired beauty with black hair and blue eyes, whose silence alone made her seem especially refined, aloof, and imposing [copied and pasted three times] (√√√)

Finally, System A3111 decided to give the strawberry a technique, supernatural ability, flame, or whatever strange name you liked, with vast potential that would let her grow powerful enough to annihilate the world...

...Oh, the System didn't need to prepare this part. It just had to pass off the strawberry's built-in mecha as those abilities.

After that, all it had to do was wait for the strawberry to shake the whole world with the awe-inspiring might of a mecha war god.

No matter how powerful you are, you still have to fear a mecha. (Sung with feeling)

*Meimeizi is a strawberry. A real strawberry.

Theme: The world is sweet