The young man Lingyou traveled to the world of Demon Slayer by accident and acquired a system that could travel through the heavens.

World order: Demon Slayer: Kimetsu no Yaiba (completed) - Seraph of the End (completed) - (a certain scientific railgun) A Certain Magical Index - Fairy Tail

Shai Zai encountered something big enough to change his life in his first year of high school!

At first, he thought that the big event was receiving an invitation from the literary club Chen Wenwen to join the club.

Later, he realized that the "ding" sound in his ears that night was the biggest fork in the road of his life.

Ding--!

This simulation system is a second-person simulation, assisted by holographic simulation CG. It is committed to tapping the host's own potential and strength while building the host into a new era youth with independent spirit and sound intelligence, so as to save the original tragedy.

The host is asked to select the world for the first simulation from the following choices:

[1. April is your lie (low-level single world), the sweet love that disappears in April, you deserve it! 】

[2. Demon Slayer: Kimetsu no Yaiba (intermediate series world), a passionate journey filled with blood and blades, heavy breathing connecting the bonds, and the countless tragic songs that are coming, can it ignite the roar deep in your heart. 】

[3. Dragon Clan (Advanced Series World), in this world, the burning golden eyes face the soaring dragon. The night of rain and madness extinguishes the cowardice of young people. The flames sleeping on the bottom of the sea cannot ignite the brothers' thousand-year journey against the enemy, echoing in the underground. The sonorous clang killed the immature girl. The withered witch sleeping in the red well is waiting for someone to save her. Listen, the young man without regrets in the deep snow of Siberia is calling for the return of the king. 】

A few years later, Lu, the good man, Longzhu, the savior of the tragedy of all worlds, the strongest good student in Kassel, Mingfei faced the hole opening in the void and couldn't help but murmur,

"Those simulated worlds are indeed real!"

I have just traveled to the original god, and I have a golden finger. I want to succeed the rock god, and also come with a well-behaved and obedient secretary Gan Yu?

Just when Zhong Rui was about to say that it has never been such a wonderful start, the necessary system for time travelers has officially awakened!

【Ding! Life Simulator is always at your service! 】

【Ding! The dimensional chat group is now open for you! 】

【Ding! Self-discipline makes you stronger. The system is loaded! 】

[The life selection system has awakened! The host is asked to make a choice within thirty seconds, give up the choice, and erase it immediately! 】

Zhong Rui:?

The next second, he took out the body of the life selection system and held it in the palm of his hand.

Zhong Rui: Say it again? (Smile)

Life selection system:? ? ?

Bribing fools to deceive the Queen of Winter, causing the largest and most evil Shura field in the history of the Fire Chaser, exploiting the natives of another world with Kazuma, taking the miserable boss to sunbathe, etc...

Celebrate!

He is a god who combines the power of many systems into one, transcends time and space, and knows the past and the future!