If you loved Fumiko's Confession, try Love Hina Christmas Special: Silent Eve
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
Theyboth carry the playful mood tag, and they sit in Animation / Comedy / Romance territory. If that's the register that drew you to Fumiko's Confession, the second film will land in a comparable space — through a different lens.
playful
What Love Hina Christmas Special: Silent Eve is
A seasonal anime special goes for the obvious. Keitaro must declare his love on Christmas Eve, or face a year of bad luck, and/or more entrance exams. It's tough to care when the stakes are this low.

