On one of their early dates, Erica and Vicky ride a Ferris wheel, which may be a terrible idea since Erica is afraid of heights. No matter: Next thing we know, they’re shopping for a bed.

But wait, weren’t they separated in the first scene of “Bright Half Life,” Tanya Barfield’s new play?

And why are they arguing right after trying out that bed?

The relationship Barfield looks at may be fairly banal, but the playwright’s non-chronological approach isn’t. Reconciliations are shown before arguments, kids mentioned right after talk of estrangement. As for the couple’s two children, information about them is parsed out during the 75-minute show.

It’s up to the audience to put the final portrait together.

Vicky (Rachael Holmes) and Erica (Rebecca Henderson) start off as office mates before becoming lovers. Happy memories alternate with frustration and even anger, as Erica berates Vicky for hiding the truth about their relationship from her parents.

“Call them right now and tell them I’m not your roommate that helps you raise your kids,” she says. “They’re our kids.”

Diana Son used a similar technique in her 1998 hit, “Stop Kiss.” But that play had more emotional weight than this one, which feels slight. “Bright Half Life” is the rare play you actually wish went on longer, giving us more time to know its characters.

Still, Henderson and Holmes succeed in filling in the blanks. And under Leigh Silverman’s restrained direction, they also avoid the clichés associated with aging in a play that spans several decades. Better still, the actresses’ easy rapport seems comfortable and real — like the best love stories.