Zero no Tsukaima - Volume 20 epilogue

A broken man who ended his own life finds himself reincarnated into the game he used to play. However, instead of becoming the protagonist or a powerful antagonist, fate places him in the role of a minor villain—a mere stepping stone for the protagonist in the game's first arc.

Haruka, consulted by a friend who ran into a ghost at school, goes to the Movie Research Circle to see a man with mysterious powers. However, the person who meets her there is an affected young man with terrible bed hair and sleepy eyes. What does Haruka consult him about? A confinement and murder case at a women’s university, a false suicide case… The great detective who can see the spirits of the dead, Saitou Yakumo, takes these cases on in this astoundingly high-speed spiritual mystery!

[Invincible, showoff, face-slapping, feelgood]“Who is richer? Sorry, Every watch I have is worth billions. Money is just a number to me!”“Wanna fight? Fine, I won't even use my hands and feet. I've never lost a fight in my life!”“You like me? Sorry, even a cruise ship is not big enough to hold all the women I have. Haven't you seen the princess of Anenida lining up for me?”With the invincible system, everything can be easily accomplished.Please don't show off in front of me. I have a nickname called Face-slapping Zhang!

When he returned to the World of Martial Arts, the game was filled with blood and battles! Chen Kaixin had chased after the footsteps of the one emperor, two empresses, three princes, seven dukes, and thirteen aces for three years, but during the eve of the Sword Among Us tournament in Mount Hua, he was ambushed by evil bastards, and was killed so much that his level dropped to that of a newbie. He completely lost the chance to join the ranks of the powerful players in the game! In great disappointment, Kaixin quit the game and got drunk so that he could forget his sadness, but during that stormy night, Chen Kaixin found that he had actually dreamed for a total of three years, because when he woke up again, he woke up to three years ago, when he was still a student.

- Description from Novelupdates