To Gyeon-woo, who dreams of normal college life, even though he’s not an insider, she suddenly says, “Have you ever tried it…? Sex .” “…Yeah?” Official Webtoon Official English Translation

Satoru and Souma were classmates in the military training academy. Satoru always viewed Souma as a rival, but Souma never seemed to take him seriously. Now, after graduation, Souma is in the elite Spade Corp...

You see what you get? Your sister was nice enough to get you off with her feet and you dirtied up her clothes. You deserve what she does to you.