I Made a Promise with Him a Hundred Thousand Years Ago

Hikali, a time-traveler from another world, originally thought that he could cheat like other protagonists in time-travel novels and live a life of pretense and slap in the face, but this was not the case. He found that the water in this world was very deep. A show-off plot? No. System or cheat? Neither. Some of them only have the skills they learned from a few big guys, and the friends around them. He discovered that there were many time-travelers like him in the history of this world, but some of these time-travelers lived in seclusion in the world, and some were missing. The most famous one chose to retreat to the country when he was about to unify the continent, and never made any further moves. He also discovered that there were parts of the world's history that had been deliberately erased, and he didn't know who was responsible for them. It seems that the Abyss Cult is everywhere, the endless travelers, the history that has been deliberately erased, and the mysterious sounds he hears when he travels through time. He plans to find the answers to these questions... This story spanning a long time will also be staged here This is a harem story. If you want 1v1, please avoid it. It is not a cool story. It has made a lot of patches in order to be as non-depressing as possible. Friends who like it can come in and have a look. If you feel bored in the first volume, you can skip directly. The main part will be at the end.