To Avoid Death, I Made a Deal with the Devil

Jiang Yan, a person who was extremely afraid of death, got cancer. So he accepted the deal proposed by the devil who suddenly came to his ward and helped him collect the things most needed by the people designated by the devil in the seven worlds. Jiang Yan didn't know why the devil chose him, nor what the mission meant. He only knew that for him, this was the only chance to seize life. (Dog lovers persecute honest people) (This book involves a little bit of fairy tales and does not have a big world view. The gods in my book just want to fall in love)