Novo

Anterograde amnesia, the inability to form new memories, is a popular plot device. It allows storytellers to repeatedly explore the protagonist's plight, without all the extra suspension of disbelief that comes with using a time loop instead. It's almost always caused by vitamin B1 deficiency from repeatedly getting blackout drunk or anorexic/bulimic extreme fasting. But being self-inflicted would make the protagonist unsympathetic, so the storytellers contrive it to be caused by trauma. Examples: Clean Slate (1994), Memento (2000), Novo (2002), 50 First Dates (2004), etc. Those are not spoilers, because the condition is revealed at the start of the films, usually even in the advertising!

Novo is one of the better anterograde amnesia films. It has a point to make, comparing love and lust in the light of shared memories.

Odd none of the others showed up in its "More like this" list, don't you think?