The City of Moon Project: A Handbook for Raising Rien

Rien, the Index, Executor of Hermes's divine oracles. Recently, he had a falling-out with the command he belonged to. Hermes was baffled. Hermes was puzzled. Why hadn't the plot that had been going so smoothly ended in a perfect C-route clear? Hermes reflected and reviewed, then rallied and decided to pick a world and start over. This time, Hermes would definitely raise a “Roland” of their own. A newly acquired special soul would serve as the core., His memories of the past might interfere with the growth scenario, so Hermes decided to keep them safe for now. Add a spoonful of a certain pitch-black gentleman to the recipe. Then a spoonful of “Hell's Transformation.” And “The Phantom of the Opera”... Oh no, it looks like we added too much Phantom! I-it's fine! Right, besides a wife, let's also give Roland a friend this time. That should balance things out, probably. Reader advisory: Slow burn, primarily set in the Library of Ruina urban fantasy setting, 19+ warning, you know what that means. There are crossover arcs with Arknights and the Nasuverse. The protagonist is a transmigrator and a man, but he has no memories or only incomplete memories early on, so this doesn't interfere with his growth into Rien. In this story, his real name before he was renamed Rien was Eric. Once he reaches adulthood, there are urban gacha-for-wood segments. The role of Olivier is Ayin.