Classmate, Want a System?

Synopsis: I once swore to diligently accept the alterations from another world, striving to be an upright, tolerant person, and definitely not to cheat children. But, the system gave too much. The first top-up already gifted the First-Class martial art 《Eighteen Dragon Subduing Palms》! ——————————— Peach and plum spring breeze, a cup of wine; The rivers and lakes in the night rain, the lights for ten years. The hall full of flowers, three thousand guests drunk; One sword's frost chills fourteen cities.