[Mainly Dark Cultivation] Problem Children Come from Another World

Chiruna Zoldyck always remembered the first time she met Koro-sensei. It was a sunny, bright day. "Next, let me introduce our transfer student." Mr. Karasuma stood ramrod straight at the podium, as sharp as a steel blade. His voice was low and stern. "Nanaumi Mariya. She'll be joining you in assassination training for the next year." The enormous yellow octopus squirmed its tentacles, eagerly watching the classroom door open so he could warmly welcome yet another student. The moment he saw her, however, he shot up onto the roof and screamed for help. The Reaper always remembered the first time he met Chiruna Zoldyck. It was a dark and windy night. "Good evening, little miss. What are you doing out here so late?" He was as elegant as a vampire in the dark, his gentle voice full of temptation. "How about coming to play with me?" The lightly dressed girl gave a slight nod as she watched him reach out a bony, well-defined hand. Before that hand could grasp the dagger sliding from her sleeve, she expressionlessly snapped his arm. ※※※ "Thank you for calling the Zoldyck hotline. Chiruna Zoldyck at your service. Assassinations start at ten million yen, protection at twenty million. Special requests may incur additional charges. Also, if you're Koro-sensei, please just die. I'll take the ten billion." "Chiruna-chan is so violent. Give me back the Mariya-chan who used to cling to my tentacles and sweetly call me teacher." "Sure thing, Mr. Reaper. You should die too." ※ The heroine is from Hunter x Hunter, Killua's twin sister. Her motto is: My little brother is the cutest. She's a problem child. Her Japanese name, Nanaumi Mariya, was inspired by Nana, meaning seven, and by Mariya Ise, the voice actress for the new version of Hunter x Hunter's little Killua. This is a tribute to her! ※ With the different world settings, she might not rank very high in Hunter x Hunter, but here her combat power is off the charts, off the charts, off the charts. Repeating important things three times. ※ Regarding "Speed Teacher" (to avoid censorship, ahem), there really isn't a character I like enough to start a fic just to romance them. What I love most is the atmosphere of Class E: everyone getting along, united, working hard, and striving to rub Class A's faces in it. So I wrote a problem child. [Where's the logic in that?] ※ Also, I'll admit it! I wasn't interested in Koro-sensei at first! I liked the first-generation Reaper's character design! The author has a thing for trench coats and long boots, and that outfit really hits me right in the heart! ※ Big Brother Illumi is a real troublemaker. [Wait a minute.]