secretly from the past

Will is naked when he's about to get the face surgery from Cordell. We see a scene of him in the operation chair where he's shirtless, lower body covered by a hospital blanket. Hannibal, who cut himself free from the ropes that were holding him captive on Muskrat farm, who then killed a large sum of Mason's staff including trained security and surgeons, saves him before Will's face gets removed. This all happens off-screen. The next scene is Hannibal carrying Will (bridal style) through the snow. In this scene Will is dressed, including a jacket for the cold and all that. Imagine Hannibal, the violent beast we saw when he killed Mason's men, blood probably still on his hands, finding Will there. Unconscious, and then dressing him. Dressing someone is a very intimate thing, especially someone unconscious. It requires care and gentleness. That, and knowing how to handle a body and loving someone enough to dress them while they don't need to be. He buttoned his buttons for him, tied his shoes, put him in a jacket to make sure he wouldn't get cold - I mean, Hannibal himself doesn't even wear a jacket in that scene. There's blood and wounds all over Hannibal's face, he's exhausted and probably the one in the most physical danger, yet he takes care of Will before he takes care of himself.

This hits even harder if you think about why they ended up in Muskrat farm in the first place. In Florence, Hannibal tried to 'eat' Will. He tried to split his head open with a bone saw. That intense violence, the grotesque and desperate nature of those actions makes a perfect and sharp contrast to him saving Will after outside forces try to take their lives, which is a heroically gentle and intimate action. He didn't have to dress him up like that, he didn't have to carry him that way, but he did. Hannibal fails to kill Will in Florence, and with that he fails his last attempt to get rid of his feelings for Will. Or at least, to make his feelings bearable. He thinks that he can control himself better when Will is dead, so he tries to kill him but he fails. Not because he's stopped, but simply because he can't do it. If Hannibal wanted him dead, Will would have been dead. Mason's men only interrupted his theatrics. They gave him a reason to put away the saw and act like it was purely their fault, but then Will is in danger at the farm and Hannibal does everything in his power to save him and get him home safe and well. At home he takes off his jacket, literally lays him in bed and tucks him in. He covers Will with a blanket, he tries to write mathematical formulas to reverse time and cleans his wounds. That's why Will's rejection when he wakes up is so tragic and hard to watch. It breaks Hannibal, unbreakable and inhuman Hannibal Lecter. It simply hurts him enough to break his heart. It breaks him enough to give up everything he ever lived for and surrender to the FBI, which he spent a lifetime running from. He does this because when he decided to save Will, he realised he would never get over the things he felt for him. In Hannibal's mind, the worst thing that can happen is never seeing Will again. He finally realised that, after everything, and that's why he surrenders to the FBI.

Hannibal honey, you don't want to eat his brain. You just wanted him to love you.