Tower Defense & Dungeon Attack RPG I saw the ending to the game no one was able to clear. But, when I came to my senses, I was inside of the game. In fact, I was in the tutorial stage, a place where strategy was impossible. “I’ll clear this bullshit game no matter what……!”

Tyrant of the Tower Defense Game

디펜스 게임의 폭군이 되었다
https://treemanga.com/manga/i-became-the-tyrant-of-a-defense-game/