MEMORIZE is a Korean action/fantasy web novel that spans 1069 chapters (main-story and side-story included) that began in 2012 written by Ro Yo-Yu-jin. Furthermore, it has been adapted into a weekly released manhwa under the same name and is drawn by Jung Ha. It is the precursor to the story The Second Coming of Gluttony which was later written by Ro Yo-Yu-jin.
After being held captive to another world named Hall Plain for ten arduous long years Kim Soohyun had reached the pinnacle and finally attained the Zero Code, a divine artifact that can fulfill any wish from its wielder. With the power that can accomplish anything, he could rule the entirety of Hall Pain as king or return back home with all his powers intact. Rather he decided against it, and choose to go back to the very first day he arrived in the treacherous Hall Plain and redo his ten years in order to save the people he loved and cherished that had sacrificed themselves for his sake. Now being blessed with additional skills by Seraph and his insight from his future knowledge, he will now utilize everything he has to save those who he had cared for and become a person who will protect others instead of being protected. And in doing so he can now save his older brother and his lover from the dark future he has experienced.
[Written By Fandom.com]