Regressor of the Fallen Family - Chapter 173

Link, who traveled to the world of pirates, brought Doraemon’s treasure bag.

Just happened to meet Luffy who went out to sea, and has not awakened the true fruit ability of [Renren Fruit Illusory Beast Species Sun King Form], and he is still the rubber fruit Luffy.

That being the case, then I will follow this future One Piece, even more Liberation Warrior Joey Boy, the future Sun King *ka! !

Let’s enjoy the magnificent style of this pirate world together! !

In the process of traveling, all kinds of props also showed a powerful effect from Link’s hands! !

Luffy, actually [rubber fruit] has another name, do you know?

Hawkeye, are you the strongest swordsman in the world? 【Famous Knife·Electric Pill】Learn about it! !

Kaido, do you have the strongest animal army? I have some good flavors of 【Momotaro Rice Balls】, you can try it!

Im, do you want to destroy the world? 【Earth Destruction Bomb】Do you want it for you..

- Description from novelbuddy

Three years ago, in the land of Reinbulk, a Legendary Hero was summoned in the Kindom of Leezalion and he succeeded in repelling the Demon King. Now, five students are summoned back into Reinbulk by the Kingdom of Luxeria to fight against the Demon King and the demon army. Unlike the other heroes, Yashiro Yuu has no magical affinity and the Luxeria Kingdom has no intention on acknowledging his existence or returning him to his world.

An ordinary student, a wretched peeper, a cowardly teenager with a kind heart. In a terrorist attack, he inherited the knowledge of countless elites, embarked on a path of God Jagged Tu…

He is an artist!

He is a mathematician!

He is a psychology Doctor!

He is a master of fighting!

In fact, he is a man

Taken off raw site:

A wretched, dirty young man is working during the summer when he was caught up in a mysterious explosion. After that explosion, the young man is then left with the memories and knowledge of dozens of the world’s experts.

He has changed, his heart has become cold, iron-blooded. He became a killing machine, his mind turned mechanical, calculative. Everything goes according to his plans and calculations!

In this magical, slaughterous world, a door is opened for him…

- Description from Novelupdates

A little ruffian who fought recklessly without any morals and bottomline accidentally time-traveled to parallel space and became a Key Case Investigation Team agent. The huge change in identity had him creating chaos in the police station. However, a strange miracle system helped him repeatedly solve mysterious cases, turning him into an impudent ruffian detective!