Original title was 血の交わり (Chi no majiwari). 交わり seems to have three meanings, which I will list: fellowship, sexual intercourse and intersection.

Furinkan notes that: "The week this was published the global Coronavirus pandemic was beginning and discussion of businesses being closed was starting to be heard on the news. Soon everyone would begin working remotely. Some small delays in the publication of Shonen Sunday will crop up eventually."

March 11th, 2020. Author's note:
"Q: It's Doraemon's 50th Anniversary! What gadget would you want to use more than any other?
A: The Anywhere Door."