Luffy eats a strange fruit and ends up in the bnha universe.

Four megalomaniacal villains with strange, unstoppable quirks, acting on behalf of the "World Government," magically appear in the world of heroes. And the students of UA High find themselves caught in the middle again as the invaders target the #1 hero All Might. - DISCONTINUED, sorry

Usopp and Luffy finally say something to end it all.

Midoriya Zoro, also known as Roronoa, or the Villain Hunter, is the elder brother of the Quirkless Midorya Izuku. Zoro, the deputy leader of the Strawhats, a group of Heroes who devote their time to protecting U.A.. Zoro, the world's most infamous Hero. Zoro, the man that Izuku wanted to grow up to be like.

Midoriya Izuku has always admired two people. All Might: The world's #1 Hero, and his secret older brother: Midoriya-Roronoa Zoro, who is apart of the infamous and independent "hero" company One Piece. The current boss, only known to the public as "Dark King," assigns the Monster Trio of the Strawhats to Yuuei Academia after the revelation of All Might's true form.

Izuku fell from his fight but he still rose up and stood even taller than before, awakened with his new abilities plus a new personality will he finally become the Hero he was meant to be or will he stay as a weak boy forever?. (Sanji Abilities from One Piece), May have romance.

Deku is a young Teenager who strives to prove that he can be a hero even if he is quirkless. Until his favorite Hero says just to give up and become a normal civilian. Deku Heartbroken goes to the alley where he meets a Strange Mysterious Man that will change his life. (Sorry I couldn't find Boku No Hero Academia in Crossover Category)