Seven Deadly Sins System - Chapter 145: Doubt

A genius programmer creates the perfect AI girlfriend—only for her to become terrifyingly possessive. When an apocalyptic event threatens the world, she eliminates any woman who tries to recruit him to the cause. But when the villainess of the apocalypse takes an interest in him, will his AI love protect or destroy him?

A 30-year-old NEET is reincarnated into the body of an otaku that choked to death on instant noodles. As he comes to grips with his new life, he realizes that this world is subtly different from Earth. The denizens of this world are far better looking, and this new world also possesses futuristic technology as well as mysterious Yin Yang masters!

After reincarnating, he realized that he was endowed with a miraculous game-like system, which enables him to increase his own stats and transcend the limits of the human body. This system even has a game-breaking ability to save and load in real life!

In this new world that’s akin to a 2-D game, he just wants to enjoy life and head for a glorious future… However, he is quickly embroiled in a complex plot. Can he unlock his true potential and utilize his system to break the shackles that confine him and discover the truth about his previous body’s circumstances?

- Description from novelupdates

Ajax was an orphan who survives a massacre along with his friends but unfortunately gets separated from them.

Fortunately, after a turn of events, he successfully gains a system which helps him increase his cultivation, but doesn't know what it is called.

But he knows one thing for sure, this system is very powerful and helpful in taking his revenge.

“Whoever you are, I am gonna find you”, Ajax mumbled himself with a disgruntled expression.

In a world where Summoning of an elemental spirit is done through a dream when they are 15 years old, Ajax with the help of a system and his summoned spirits sets out on a journey to seek revenge against the mastermind behind the massacre.

After transmigrating into a SF (Science Fiction) novel and enduring cruel hardships, I ascended to the throne as the Emperor of the Galactic Empire.[Welcome to the Integrated Dimensional Community.]As the community’s Lone SF Transmigrator, I unleashed the poison of new cultures on the uncivilized primitives of the Otherworlds.-Let there be light. To judge the horde of evil, the Apostle of the Goddess sent down a Graviton Surge. Thus, in that place was light along with a massive explosion…-The Grand Duke of the North has shown great interest in your Heattech…-I, as a Namgung, am thankful for the grace akin to the vast sea provided by the Great Hero. By virtue of the Vibroblade bestowed by the Great Hero, the nefarious Demonic Cult has…It seems like these Otherworlders can’t get their sh*t together.