Bertolt x reader (the beautiful pain)

people of wall, they are the most humiliating people in Eldian eyes, but after years inhabited there, Bertolt changed small part of his thought, there, he has met (y/n) who is people of wall. People of wall who once he hated, he has own sins on them by kicking the wall. Because the name of love, he put beside the feel of despised on wall people, and give (y/n) a space of love in his heart, just for you, his love. But something slowly changing, he needs to go back to his hometown, but how? he wont let his love living in the wall, the place which is no future, he thought. But how he gonna reveal his great secret to someone loathe it.