Grim Guardians Demon Purge - Boss Rush Speedrun

I am not a professional Speedrunner, this is a personal challenge and hobby, I hope you enjoy the video!
Game name : Grim Guardians Demon Purge / Gal Guardians Demon Purge
Game version : v1.0.2
Game mode : Boss Rush
Difficulty : Casual
Player Power : Upgraded
Weapon Point : Limited
Challenge mode : OFF
Finish Time (RTA) : 8:56
Main challenge : Finish run before 9min
Secord challenge : Full boss rush no death
Number of try : 5