I'm Obviously the Protagonist, Right?

[A middle-class girl + pure love + epic + funny + slow-burning + invincibility + an imaginary world view] (This book is also called: "So, the middle-class girl with a sword embarks on a journey" Gu Pingsheng has always felt that as a time traveler with a system cheat and X-level powers... He should be the protagonist of this world... After all, even the way to travel is so old-fashioned - high-speed luck and portal... Until he met that girl... What does the system mean by this girl who looks like she's not very smart and is wearing a cosplay and saying some weird things? Her total attributes are 9.99 Million! What does it mean to cut the X-level zombie king out of nuclear fusion with one sword? This world is getting more and more outrageous· Gu Pingsheng thinks so