(One female lead) (No System) (Otherworld)
Chen Ping, a college student, accidentally transmigrates to a world filled with magic. Unfortunately, humans have no magic circuits, so they can only use simple spells. To survive, people created the profession of witch hunter. After escaping from a succubus, Chen Ping is rescued by Victor, an old witch hunter. Victor notices that Chen Ping is different and decides to train him into a proper witch hunter.
Chen Ping is full of anticipation for life in this otherworld, unaware of what the future has in store for him.
Perhaps we should change the title; this is a completely isekai (another world) story, and you won't even see the female lead.
It can only be described as invincible.