OR Pretending That He Doesnt Know Its Creepy Is Literally Such A Good Take - Tumblr Posts
(Slight continuation of yesterday's headcanon about MC's old pictures.)
The palace library is the finest collection of knowledge and tomes in the kingdom, even more so than RAD's (which is likely based off of the royal collection with a more academic flair).
Many books are restricted only to nobles or special guests, and among those are books reserved only for the royal family. They're so exclusive that hardly anybody outside of the royal family even knows what they are.
Even more elusive than those are the books Diavolo and his parents keep in their private bedrooms. Tomes that are said to be mere legends or rumors. You could count the number of people who have ever seen them in person on one hand.
This is where Diavolo keeps it. Sandwiched in between a millennia-old genealogy of the Devildom's rulers and a cursed book containing the damned souls of all who touch it stands a picture album containing photos of MC from years before they arrived in the Devildom.
Many underhanded and even illegal means were used to obtain these treasures. Diavolo personally organized the album, adding fun stickers and handwritten captions to each photo. Its contents were unfortunately sparse, as such images were unimaginably difficult to obtain. A concerning amount of them look to be security camera footage from public places. But if something is easy to find, it's not very fun to collect.
(I don't think he'd earnestly hide it. I think he might go "MC, look what I have! Let's look at it together. :) " and MC would say "Diavolo this is considered a felony in at least 95 human countries.")