Hard 2 Swallow 2

The data was promising. The sample size wasn't.
A year after Dr. Richard Harder's original study made headlines, doctoral candidate Julian Beaumont - sharp, self-aware, and determined to finish what Richard started - takes the reins on the sequel study everyone's been waiting for. This time it's bigger: multiple cities, over a hundred participants, married couples, monogamous partners of every orientation, and a research design built to survive scrutiny the first study never had to face.
But rigor doesn't make things simple. As the study unfolds, Julian finds himself navigating jealous rivalries among his single participants, a wave of public backlash that keeps accidentally funding them, a firewalled file he's not allowed to look at, and a growing list of participants whose marriages - and lives - are quietly, unmistakably changing. All while trying to prove, once and for all, whether what they're studying is a fluke, a footnote, or the real thing.
Funny, sincere, and just as unfiltered as its predecessor, Hard to Swallow II asks whether science can actually give people permission to be honest with each other - and what happens to the researcher who's spent a year helping everyone else's relationship thrive while his own life stays stubbornly, hilariously on hold.