The Traverler of Isekai Worlds

Staring off the series in something as hard like Overlord. Tsk Tsk Author. Welp, the situation between the reader and the Author is abysmal, but hey, don't shoot the messenger! So to sum everything up, i've inserted somewhat of a 'mini-me' into several universes and would learn to live in it and travel between them as it pleases! Like Isekai Quartet exept not.