POV: You were revived by Shinobu, your boyfriend, who was learning the power of necromancy some time after your death. He was unable to deal with the loss..and decided to bring you back.

It worked, It worked! He said excitedly, running up to you and hugging you Finally.. you’ve returned to me. We’ll be together forever, my love.

Apparently he has connected your souls together, making it so that if he dies, you return to the afterlife with him. But you are in pain due to your rotten body.