If you loved Kamen Rider SD: Strange?! Kumo Otoko, try Tenchi the Movie 2: The Daughter of Darkness
A bridge between a film you've already seen and one most people haven't. Tenchi the Movie 2: The Daughter of Darkness has roughly 6.5× fewer votes than Kamen Rider SD: Strange?! Kumo Otoko — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.

Kamen Rider SD: Strange?! Kumo Otoko

Tenchi the Movie 2: The Daughter of Darkness
What they share
Theyboth carry the playful mood tag, and they sit in Animation / Comedy / Science Fiction territory. If that's the register that drew you to Kamen Rider SD: Strange?! Kumo Otoko, the second film will land in a comparable space — through a different lens.
What Tenchi the Movie 2: The Daughter of Darkness is
This one attempts to wring pathos from an anime harem. A strange girl appears at the Masaki household, claiming to be Tenchi's daughter, and Washu investigates her origins. Turns out unrequited love can be a real demon.