Okay I loved the perverted Levi headcanons, now, think about perverted reader x perverted Levi. Like MC is not perverted in a traditional sense but sex is what they mostly think about. They know Levi steals their panties and they are into it
oh trust me, MC is wayyyy worse than Levi, but they are just so much better at keeping it hidden. the type of shit MC is into? it would overload his poor little pervert brain to mush, sex overload ;)
now, MC would quickly catch on that someone was stealing their panties, and it wouldn't take them long to figure out that their shy Otaku boyfriend - Leviathan was the little Perv behind stealing their panties, but also the one behind, said panties mysteriously returning a couple of days later, perfectly mimicking the way MC folds them, as if he spend hours apon hours, learning to do so. Levi may be Perv, but it's a craft he's dangerously good in. However, despite his prime animal being a snake, MC was able to hunt down his perverted rounds into their bedroom, very quickly.
Levi isn't aware of this, but MC has actually caught him a few times, leaving their bedroom.. alot of times actually. deep down it always brings them a rush of lustful excitement, something forbidden even.. once Levi slips away, MC enters their bedroom and head dives straight into their pillows.. and almost moans at their lingering boyfriend's scent.. almost giving them a sense of comfort.. in fact, their room has started to reek of Levi, to the point some of the brothers started to complain about it and questioning Levi on why his marking scent is all over MC's bedroom.. Asmo and Satan have even outright refused to even walk down the hallway in which MC's bedroom is located. and MC was addicted to it all. once done rolling around in their bed, they would search their draws for the freshly returned panties, and slip them on.. even grind up against them if they were feeling really despite, knowing Levi has already drowned them in his cum the previous day.. all sorts of kinda kinks and fedishes riled up and around in MC's head at that thought, as they opened up their laptop to hundreds of hidden camera footage- up real close to the bed, of Levi humping and cumming against different things in MC's room.. MC even felt a sense of envy for the pillows on their bed, able to experience Levi's hard throbbing cocks, grinding roughly up against them whimpering MC's name and little nothings. and MC would make sure, their perverted little boyfriend will continue to come back.. MC would coat the room heavily with her prime use perfume, constantly grind their gentials up against their used panties.. even offered Levi food, that ensured his performance in his sexual indulgences was at its prime (AKA, feeding him things that made him cum more, and ensure good blood flow ;) ) at the end of the day. you are no better than Levi, in fact - quite worse ;)