The mating rituals, commitment phobia and communication issues of a much-maligned generation are sent up, with amusingly mixed results, in “Oh, Hi!” — a rom-com that almost goes for it and almost comes off before losing its nerve.

Writer-director Sophie Brooks pairs-up former child star Logan Lerman (“Percy Jackson,” “Fury,” TV’s “We Were the Lucky Ones”) and nepo baby Molly Gordon, who gets a story credit and moves from small supporting roles in “Shiva Baby,” “Booksmart” and TV’s “Animal Kingdom” into the spotlight as a young woman who misreads the signals from her new beau and doesn’t take that well. At all.

And frankly, you can see Iris’s point. She’s loaded up her vintage Jeep Cherokee for a fun weekend in the country, and Isaac seems totally present for the bubbly cute chatterbox who is his companion. Just two young New Yorkers having a sing-along to “Islands in the Stream” on the ride, basking in the upstate scenery, gawking at the over-equipped secluded AirBnB they’ve rented and get right down to sex before a single awkward silence can enter in the conversation.

We figure out it’s “early” in this “relationship.” He’s reading “Blindness” by Jose Camargo and she’s “not really a reader. I’m more of a movie lady.” But she probably didn’t see the film adaptation of that novel, either. “Casablanca” is more her speed.

They share their first impressions of each other — “I thought you were a f—boy.”And they exchange answers on “Have you ever had your heart broken?”

Isaac seems genuinely interested, cooking scallops for her before the evening’s second round of passion. She’s busted into the owners’ S&M stash because “Locked doors give me anxiety.” That may be the most Gen Z line in this.

So, who gets to tie up whom? Isaac agrees, and the novelty of the experience lifts their lovemaking. But his warning might have been the “ever had your heart broken” question and her answer to it. She has and didn’t take it well. “Insane urge to stab” comes up.

Handsome, politically connected Isaac is downright cavalier in dismissing the idea he might have had his “heart broken.” Bluntly contradicting Iris when she starts talking about how well things are going after three dates and “our first trip as a couple” seals his fate.

“I’m not really looking for a relationship right now.”

Those wrist cuffs and ankle cuffs he’s in? They’re not coming off. And as the story is framed within Iris’s call to her ride-or-die Max (Geraldine Viswanathan of “You’re Cordially Invited,” “Thunderbolts*” and “Seven Days”) — “I did a thing…I did something bad.” — we expect the worst.

As Iris decides to hold him captive to try and convince Isaac of their potential, the worst is worse than we fear.

“Oh my God, does he not like FRENCH toast?”

Brooks’ second feature (after “The Boy Downstairs”) doesn’t so much lose its edge as simply give it away. And as it does, the fun and the life sputter out of what might have been a skewering comedy.

Isaac comes off as a barely-sketched-in heel, topping off that with a cluelessness about the fairer sex and human emotions. His inability to “read the room” where Iris is concerned is worsened by insisting he’s just being “honest.” He finishes that off with the occasional “Gen Z Stare”at her reactions.

A generation that gets a bad rap for being fragile and easily hurt and rude by not considering other people’s feelings is sent up in this one character.

But Iris makes a call to her mother (Polly Draper of “thirtysomething”) about her disappointment and Boomer Mom’s advice is every bit as cliched and tone deaf as Isaac’s.

“Sometimes men don’t know what’s best for him.”

John Reynolds scores a chuckle or two as Max’s along-for-the-ride boyfriend, here to advise Iris about the legal problems tying someone up can put you in. And David Cross is the cranky “You kids can’t have sex there” neighbor with virtually nothing funny to do or play.

But the promise in this premise is Gordon’s Iris, a hapless young woman who feels victimized by everything men of her generation’s dating pool fear or simply have no interest in. Gordon made me think of her “Shiva Baby” co-star Rachel Sennott in Iris’s had-enough-attitude, pushing 30 and ready for a relationship, but just now figuring out that Peter Pan Syndrome isn’t just about the prankster, but about the Lost Boys women are waiting to grow up into men you might marry.

Brooks lets her character and her star down by backing away from that edge and going all softboy, like the guy her leading man is playing, as she does.

Rating: R, sex, nudity and profanity

Cast: Molly Gordon, Logan Lerman,
Geraldine Viswanathan, John Reynolds, Polly Draper and David Cross.

Credits: Scripted and directed by Sophie Brooks. A Sony Pictures Classics release.

Running time: 1:34