What rivalry can become (Gakushu x Karma)

A little fanfiction about the characters Karma Akabane and Gakushu Asano from Assassination Classroom.
Anybody not knowing the anime, will be able to cope with my little story.
I would hate to spoiler, so I will only point out that this story contains explicitly described sexual and violent scenes, as well as combinations of both and a lot of sarcasm (boyxboy!).
People having a problem with those characteristics should not waste their time trying to read this book, because it won't be worth to read skipping all the parts mentioned before.
I want to warn you: English isn't my native language (additionally I'm only 15 y/o), so there will be a lot of mistakes whether it is grammar, orthography or logical stuff.
This book already exists in my native language (German), so you can be sure that this book is going to be finished and I will not abort this project.
Comments are obviously welcome whether they are critic, proposals or encouragement. Especially comments helping me to improve my English would be great.
I wish y'all a lot of fun reading my first little story.