Yandere!Jean has been crushing and stalking hard on Levi for many years. Levi was dating Eren, Jean hated Eren and hated how he treated Levi. He abused him all the time and never cared for Levi. Levi was the one doing all the chores and making him dinner every night, not even allowed to sleep in the same bed as Eren if he said he couldnt. Some nights Levi would cry all night, hoping something would change soon, and soon enough it did. Things could of been changed in a different way in his mind but its better then nothing.