If you loved This Boy Caught a Merman, try Fate/Prototype
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theysit in Animation / Fantasy / Romance territory. If that's the register that drew you to This Boy Caught a Merman, the second film will land in a comparable space — through a different lens.
What Fate/Prototype is
An origin point, remade. A magus and his servant Saber enter the familiar life-or-death battle for the Holy Grail. It seems the more things change, the more they stay the same.

