Killua was in a new world and, soon enough, enrolled in a school out of boredom. He would've been placed in one of the top classes, but was immediately degraded into E class after failing the writing portions. There he meets a yellow octopus who destroyed the moon into a permanent crescent moon, and his fellow students. Their goal; to assassinate the teacher. Killua refuses to assassinate the teacher and doesn't want to talk to any of the students. Will he eventually open up and will he join them in their goal of assassination? Read to find out! _________ Inspired by: Hunter x Assassination by _KC134_ Assassin's Heart (HxH and Assassination Classroom Crossover) by anime_fangirl111 Hunter x and x Assassins [HxH and AssClass crossover] by The_Salt_Demon And more! Cover by me! Assassination classroom and hunter x hunter belong to their creators! One more thing: SWEARING AND BLOOD WARNING also sexual topics and such.