[Crossover] The Whole World Is My Big Brother

[Not good, seriously, don't read it. I reread it: the first time I fell asleep, and the second time I couldn't sleep.]

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Mochizuki Natsue, a fifteen-year-old high school girl in the bloom of youth, has a peculiar kind of magic: every boy she might possibly develop feelings for ends up treating her like a little sister.

"Senpai... I..."

"Natsue, you're just too cute. I... you... would you call me big brother from now on?"

"..."

Surrounded by couples holding hands, Natsue finally makes up her mind. The Little Sister Graduation Plan is underway!

Step one: Use her strengths to eliminate anyone who doesn't treat her like a little sister.

Step two: Take him down before he knows what hit him!

Meanwhile, Akashi is troubled. What should you do when the girl you like only sees you as her big brother?

A new writer and a new story. The heroine is hopelessly in love, and the hero is Akashi.

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Content warning: There is a small amount of My Hero Academia content in chapters 21 and 22. A My Hero Academia character also appears for a few dozen words in the first chapter of the final chapter.

Theme: The heroine's romantic experiences, positive and wholesome