Dropped into the Wasteland, with a Loli Bound to Help Me Fight Monsters from the Start

[Transmigration + apocalypse + System + League of Legends skills + plenty of girls + invincible protagonist] Modern office worker Zhao Gu is inexplicably taken to the wasteland of Blue Star, where he comes face-to-face with a zombie the moment he arrives. Who could possibly handle that? Just as his frail body is about to give out, he activates the Anchor-Binding System. But why can this System only bind female characters, and why does he have to make them fight monsters for him? Why doesn’t he get any experience when he fights monsters himself? This makes no sense! With his life hanging by a thread, he has no choice but to search quickly. Grabbing a little girl is like grabbing a lifeline. You’re the one, then! Come help me fight monsters, sweetheart! One isn’t enough? Then of course, the more girls in my army, the better...