The No.1 Undercover in the Immortal World - Chapter 349 - 338 Deep Sisterly Love

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.

Alex used to be a scientist in his previous life, infamous for doing questionable biological research; now he's the prince of a nation and a chosen 'Saint' of the God of Wisdom.Despite being a 'saint,' he's a top-tier schemer and a conspiracy master who considers his goals and ambitions above everyone and everything else in the world.“Power, connections, intelligence, and money... That's all that matters in this world; those who have them are supreme!” - Alex 'The All-Knowing Saint'What will happen if such a villainous person is thrown into this new world as a supposedly benevolent and kind 'saint'? Let's find out...(NO-HAREM, SCHEMER MC, TACTICS, AND STRATEGY!)

'Did I reincarnate as the First Born son of a noble???'Jack was reincarnated as Jack Kaiser. Firstborn son of Alaric Kaiser, the strongest duke in Elysium. Born and destined for greatness. Or so they said.In a world ruled by Magic and Martial Arts, where talent determines everything, Jack's future seemed guaranteed.Until an unfortunate hunting trip left him in a 10-year coma.A system awakens within Jack. Granting quests and accelerated progression, Jack realizes he might have a chance to reclaim his destiny.In a world of dungeons, monsters, a political challenges, Jack will rise to his new title and become the Strongest Kaiser in history.