I Was Possessed By An Unknown Manga - Chapter 103: Too Many Promises

An Individual from Earth finds themselves in the Shinobi World, equipped with a Scientific System. From that moment, he delved into scientific research far ahead of its time.___This is a translation. All rights to the original content belong to their respective creators.Original Author: 王炸炸Original Title: 火影:我是大蛇丸Cover Pic: By Blueorca, let me know in the comments if you want me to take this down.___Support me on patreon for 60+ Advanced chapters: patreon.com/Blownleaves.

With peerless medical skills in one hand and unmatched Kung Fu in the other, bearing the memory of the Medical Divine, I dominate the city as the god it kneels to. I am here, so I decide your fate between life and death! I am here, so I am the heaven that dictates your destiny!

Transmigrated into the world of High School DxD, Roy believed he had been handed a life of luxury and glory. Born into the prestigious Lucifuge family, with his Sister Grayfia as his strict yet devoted older sister, he thought he was destined for greatness. 99,997… 99,998… 99,999… 100,000!!But... reality proved harsher: Roy lacked demonic talent and, despite years of training, remained a Low-Class Devil. his peers effortlessly achieve High-Class status, he’s been trapped in a cycle of endless sword practice and ridicule. Yet, he refused to accept mediocrity. Ten thousand sword swings a day, relentless training.. Until one day..[Ding! The Strongest Demon King System has been activated. Access functions to learn more.]---- High School DxD - Main World!1 - High School of the Dead [●] - First2 - Demon Slayer [●] - Second3 - Akame Ga Kill [●] - Third4 - Bladedance of Elementalers [●] - Fourth5 - Campione [●] - Fifth