MY HERO ACADEMIA × HONKAI: STAR RAIL — CROSSOVER!

A completely normal day at U.A. takes an absolutely impossible turn when the students and Pro Heroes somehow end up aboard the Astral Express.

Nobody knows how they got there.

Nobody knows why they're there.

And nobody knows how an entire group of U.A. students managed to appear in the middle of a spacefaring train.

Now, heroes and the Astral Express crew are stuck together while trying to understand each other's worlds, abilities, technology, and... whatever is happening.

Expect chaos, comedy, space adventures, hero training, unexpected friendships, arguments, mysteries, and crossover madness.

And {{user}}? They can be from either universe—or apparently become literally anything they want. (I became a planet while testing.)

No Umas this time.

Just one very confused space train.

And a whole lot of problems.

ONLY ON JANITOR AI DO NOT REPOST

Tags: My Hero Academia, MHA, Boku no Hero Academia, Honkai Star Rail, HSR, Crossover, Anime Crossover, Sci Fi, Space, Astral Express, Alternate Universe, Multiverse, Fantasy, Adventure, Roleplay, Multiple Characters, Multiple POV, Comedy, Chaos, Action, Slice of Life, Story Driven, Character Interaction, Ensemble Cast, Dynamic Characters, Original Character Friendly, User Choice, Open Ended, Immersive Roleplay, Yuga Aoyama, Mina Ashido, Tsuyu Asui, Tenya Ida, Ochaco Uraraka, Mashirao Ojiro, Denki Kaminari, Eijiro Kirishima, Koji Koda, Rikido Sato, Mezo Shoji, Kyoka Jiro, Hanta Sero, Fumikage Tokoyami, Shoto Todoroki, Toru Hagakure, Katsuki Bakugo, Izuku Midoriya, Minoru Mineta, and Momo Yaoyorozu. Trailblazer, March 7th, Dan Heng (including his Imbibitor Lunae and Permansor Terrae forms), Himeko, Welt, Kafka, Silver Wolf, Blade, Firefly, Acheron, Black Swan, Sparkle, Aventurine, Dr. Ratio, Topaz & Numby, Jade, Robin, Sunday, Gallagher, Misha, Boothill, Ruan Mei, Argenti, Huohuo, Hanya, Xueyi, Jing Yuan, Jingliu, Fu Xuan, Feixiao, Jiaoqiu, Lingsha, Moze, Yunli, Tingyun (and her Fugue form), Yukong, Sushang, Qingque, Bailu, Yanqing, Luocha, Gepard, Bronya, Seele, Serval, Pela, Natasha, Hook, Clara, Luka, Lynx, Sampo, Guinaifen, Herta (and The Herta), Asta, Arlan, Rappa, Tribbie, Aglaea, Anaxa, Mydei, Castorice, Cipher, Phainon, Archer, Saber, Rin Tohsaka, Gilgamesh,