Outworld: Seven Weapons

Time travel + irregular system + alternate history + multiple female protagonists System: I've traveled through time without looking for the system, why do you insist on me meeting you? System: You already have a system but you still practice on your own. Are your brains filled with donkey hair? System: Letting a girl protect you is not as comfortable as me being a lightbulb? System: My name is "Seven Weapons" not "Seven Nannies"! System: I want to be serious, what else do I need from you? System: You should read this book slowly. It has many girls and interesting plots.