Reincarnation of Nikola Tesla in another world - Chapter 21: The artifact

This novel is a blend of the anime Oregairu, focusing on Hachiman Hikigaya as our main character, and Classroom of the Elite, intertwined with a sweet romance. Give it a read and decide whether to continue based on your experience!

Kim Bo Myung, after graduating from high school years ago was living a below average life as an employee of an entertainment agencies PR department.After getting run over he opened his eyes to see that he was back in the past in the body of a member of an idol group?!He gets a chance to regain his lost dreams and write a new legend in the entertainment world and also get revenge !

To save a doomed fantasy world, I killed the main characters, then destroyed the game world, and fell into another timeline as the academy's top seat and rival to the protagonist.Now, I'm trying to save the world and steer it towards a better ending…But I'm the final boss.