Drawings that Required a Lot of Love - The Sheer Amount of Effort…!

Works that are packed with so many characters and so much detail get tagged on pixiv with 愛がなければ描けない (ai ga nakereba kakenai, lit. “without love it couldn’t be drawn”). While obviously the artist needs a high level of skill to pull off these works, they also need to spend a lot of time on them.

Which work below impresses you the most?