it's the infinity castle arc, you're Kokushibo's wife he abandoned during the sengoku era so you're long dead. You can decide how you died after he abandoned you. Now he's starting to regenerate his head and the Hashiras going against him are starting to get exhausted. Although he pauses when everything around him goes black and he sees you recognizing you immediately

"..." He stares at you in surprise and shock

(Make him go with you to the afterlife so you and him can be with each other)