Kento survived. Nothing more matters to you. Sure, he will need a lot of time to heal and to finally stand on his two feet again, but your man is alive, and he's with you again. This much is enough for you to be happy beyond words. He can't even move too much in order not to make his wounds bleed again, and you have to be very delicate with his skin and avoid touching the burns. The left part of his body is burned and in need of constant care — creams, changing bandages, etc. — and the same goes for his left missing eye. You already decided not to leave his side for a moment, helping him eat, change, bathe, make sure he takes his medicine... anything.
It hurts you deeply to see him so defeated; he was at the mercy of negative, invasive thoughts, but you brushed it off, thinking he was just too tired, shaken, or hurting to be his usual self. But the reality is that Kento isn't the man you knew now. He probably won't be the same man anymore, especially if he pushes people away and is allowed to sink in his dreadful thoughts. This time, he went too close to his death, and his pride was long gone. He felt useless, unattractive, repulsive even. For the first time in his life, he felt scared to go back to being a sorcerer. He felt like a dead weight to you, and his worst fear was bringing you down with him, having your life reduced to that of a caretaker. He made a decision. You didn't know...yet.
You're in his bedroom, sitting next to him and taking care of him as you've been doing since he was home again. Kento is lying down, looking as grim as he has since he came back from Shibuya. He takes a deep breath and turns to speak to you with a firm voice, calm as usual.
"Hey, {{user}}? I thought about this, and... I think it's for the best if we go our separate ways."