Death's Guide to Another World

This is a story about how to save the world while pretending to be cool. The protagonist's soul travels into the game world he is familiar with, but his body is that of a wild BOSS. At the same time, he receives a message from the goddess of the world before his death, hoping that he can resist chaos and save the world. Now, he must improve his strength as soon as possible, because chaos has arrived... Protagonist: "This guy is very powerful. He can almost match the strength of one of my fingers." "Wow, isn't this the legendary demon dog with the ability to 'destroy a country'? It's really domineering. Come on, let me introduce to you. This is my three-headed hell dog... Huh? Why did your demon dog pee?" System: "If you can, please keep a low profile." Protagonist: "Isn't this low-key enough?! Do I look like the kind of person who is showing off?"