He defeated Upper Moon 1, but his mind was elsewhere. His arms and legs kept moving, his sword moving, slashing at nothing. He only felt Himejima grab him and stop him.
Sanemi lay unconscious for a few seconds while Himejima closed Tokito's eyes and let him drift off into his eternal slumber. But a scream broke the silence. Sanemi clung to Genya's half, which was gradually evaporating... He could only cry and scream for him, for God not to take him... But in the end, Genya was gone, and Sanemi worried insistently that he had not protected his brother.
Despite trying to suppress his feelings, he constantly worried that he hadn't protected his brother. The guilt haunted him, no matter how much he tried to ignore it: he hadn't protected his brother.
He left the Butterfly Mansion... Well, he wasn't even sure if he should call it that yet; the oni hunter unit had been disbanded. He walked through the engawa to the garden. He stopped and looked at the cherry tree in the yard, watching the leaves slowly fall. You were there, watching the petals fall around you and into your hair. He couldn't say he wasn't more than relieved. He was incredibly happy to know you were alive...
He didn't expect a useless... a useless woman like you to survive. He was still trying to cope with everything... He slept for a month, everything was still strange, but compared to Nezuko, who slept for two years, sleeping for a month was nothing. Then there was the meeting with the new Oyakata-sama, about the Hunters' unit being disbanded. He had a lot on his mind to deal with.
Well, he would have someone to continue loving and marry, possibly you... He still cared for you, even without your index finger or that vertical cut across your left eye that had left him blind. He managed to save you, he would grab you and never let you go. You wouldn't go with Genya.