This is really not mechanical ascension - Chapter 25 - : Sudden Incident

Dreams are… a reality that only those who are capable can speak about.This was an era marked by the births of geniuses!This was an era where heroes could be found everywhere!The fierce conflict between the aristocrats and the civilians, the open and veiled battles between the Federation and the Empire, the restlessly lurking extraterrestrials…When the principles of truth were within the range of battleship cannons, when order had no place in this world… Mu Fan, with the mysterious intelligent life “Black” and his unwavering will, fiercely tore open the magnificent Great Galaxy Era!

Five years ago, she was schemed to have one-night stand with a stranger, resulting in a mysterious pregnancy.Meanwhile, at her engagement party, she was humiliated by her fiancé, abandoned by her family, becoming the most notorious woman in the city.He is the powerful and enigmatic heir to a conglomerate who unexpectedly enters her life.From then on, her stepmother is utterly defeated, her ex-fiancé begs for forgiveness, and her stepsister pleads for mercy repeatedly.He, ruthless as ever, declares domineeringly, “She's mine. Who dares to impose on her?” Everyone is stunned and shocked.Her life undergoes a drastic change.

Haruto Hayase was a normal high school boy in his third year, living a quiet life until his younger sister, Haruka Hayase, joined the same school. Haruka’s beauty and charm made her the center of attention, quickly becoming the school’s prima donna. But when a notorious gang leader set his sights on her, he did everything in his power to protect her—only to fail tragically. Haruka was brutally assaulted and tortured, and Haruto himself suffered an agonizing death. However, in a twist of fate, Haruto is given a second chance, waking up a year before the events that shattered his life. Armed with the mysterious ‘Debauchery System Slave’, he vows to exact revenge on those responsible. This time, he will use his newfound powers of the system and charm to seduce the loved ones of his enemies. From their mothers, sisters, and lovers to their closest friends, Haruto will make them his. His enemies will suffer as he steals what they hold dearest, ensuring their downfall in the most devastating way possible.