It is from attack on titan! It was the first anime I ever got super into and the first fandom I ever started writing fanfiction for. I finished the manga but never actually finished the anime lmao I was a massive Eren/Levi shipper and still have all my old fanfics up 😂 Past that, Mikasa/Annie and Jean/Marco were fantastic ships too 🤤 Levi was always my favourite character though!