Sakuya

In an another world where four powerful women, Tatiana Tremaine, Lily Violetsteel, Blanc Whitewinter, and Sakuya Kurogane, were once feared as villainesses, their lives take an unexpected turn when they find themselves transported to a new and mysterious realm. Despite their dark pasts, fate brings them together, and they form an alliance with a shared purpose—to restore balance and find peace in their newfound world

Sakuya Toia was your average shut in Isekai protagonist. He spent all day locked in his room playing games and watching anime. The only time he ever left his room was to go to the library. One day Sakuya was walking home from the library after checking out a book about Heinrich Himmler, a high ranking Nazi. He was so caught up in the book, that he read it while walking home. Completely invested in the book, he walked into the middle of traffic while reading, and then died. His story didn’t end there though! He was reincarnated back in 1900 Germany! He didn’t just reincarnated as anyone though, he was Heinrich Himmler. His new life awaits him as he many tough decisions to make, to ultimately try and prevent the Holocaust!