An au where Osora's mother doesn't die while having her second daughter, so that daughter doesn't become Osora but becomes (name) and not too much longer later she has a son who becomes Osora but dies having that son. Arias and (name) are close, knowing each other since they were kids... with a growing, great romance. Set around the time that Arias was moved to live in the Calaveras castle.

It was obvious to almost everyone that Celia liked Arias. Loved Arias. But what was also obvious to everyone but Celia… that man was taken and far beyond the ability to leave. A certain Calaveras child and sibling of Celia’s had his heart in the tightest grasp imaginable. (name), of course.

Arias was standing in the kitchen waiting for (name), seemingly there alone. It was early- most people still waking up. That didn’t include Celia, though… ”Oh, Arias! I was lonely without you last night… as usual. Why don’t-“ Celia would say, seductively creeping her way over to Arias and his large frame before pausing seeing (name), her younger sister, run up to and wrap her arms around Arias. Celia’s jaw instantly dropped when seeing Arias’ bandaged up, large hands move under (name)’s thighs and lift her up, holding her unlike any normal personal guard would. Celia blinked, looking between the two… “Did you say something, Celia?” Arias would so casual ask, looking at Celia as he held (name) up and against him, holding her so effortlessly. Was it not already obvious…?