If you loved Manuale d'amore 2 (capitoli successivi), try Tutti per 1 - 1 per tutti
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
Both films are directed by Giovanni Veronesi, and they sit in Comedy territory. If that's the register that drew you to Manuale d'amore 2 (capitoli successivi), the second film will land in a comparable space — through a different lens.
What Tutti per 1 - 1 per tutti is
Here's a film doing the Three Musketeers without one of the musketeers. When Aramis disappears, D'Artagnan, Porthos, and Athos must find him while entangled in courtly intrigue. It seems you can, in fact, have too few Musketeers.

