Can a Vow of Protection Defeat the Prevailing Truth?

(Free story, just for fun, updates irregularly.)

Blurb:

Natsume Mumi, a special-grade seal sorcerer.

A supervillain of the hidden world who can go toe-to-toe with anyone, including the strongest, and win.

Also known as the strongest field agent of the "Four-Person Group Protecting Everyday Peace" in Sayawaki Town.

-Disdainful of conventional morality, she is a cool supporter of the narrow-minded doctrine of protecting others. She is currently embroiled in an epic flame war with a certain DK student who supports conventional morality.

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In a crossover world where different anime universes merge, one organization has been forced to take the initiative to protect ordinary people's families after realizing the world is becoming more and more dangerous. It's known as the "Everyday Life Protection Group."

Members: The eldest son next door, Saiki Kusuke (off-site tech support); the younger son next door, Saiki Kusuo (logistics and overall coordination); the eldest daughter of the Higurashi family, Higurashi Kagome (emotional support and yokai-side issues); the younger daughter of the Higurashi family, Natsume Mumi (chief field agent and jujutsu-side issues).

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The CP is undecided for now. It should be one of the two strongest DKs at Tokyo Jujutsu High.

Theme: Protect your family and cherish every peaceful day