Anime Crossover: What Do I Do When Akame Mistakes Me for Her Husband from the Start?

From the start, Akame mistakes him for the husband she could never do without? He also gets a System that makes him stronger whenever someone mistakes him for someone else.

Akame: "You must be my husband! Back when we were in the assassin organization, you treated my wounds, cooked for me, and taught me swordsmanship. This time, you can't get away!"

Rize Kamishiro: "You must be my big brother. Otherwise, how could anyone else do it alone... **cog"

Shinobu Kocho: "You must be my fiancé! Otherwise, how could anyone else take on the Demon King one-on-one?"

Sora: "You must be my big brother! Hey! Don't run away, Big Brother!"

"Ding! Akame mistook you for someone skilled with a sword. You have obtained the Thousand-Blade Demon Sword and Level 999 basic swordsmanship!"

"Ding! Shinobu Kocho recognized you as her fiancé. You have obtained Water Breathing!"

"Ding! Rize Kamishiro mistook you for her boyfriend. You have obtained the God Form, a Ghoul transformation with no side effects!"

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.