DETROIT — Jason Orley didn’t have to study the romantic comedy playbook before making “I Want You Back.” He already knew it by heart. The filmmaker, who hails from the tiny Oakland County village of Franklin, has always had a fondness for romcoms such as “When Harry Met Sally” and “Sleepless in Seattle.” Even when his friends were praising the works of Martin Scorsese and other gritty ’70s filmmakers, Orley was gushing over Nora Ephron and Rob Reiner. “Those are the movies I grew up on,” says Orley, over a Zoom call last month. “My personal top 10 list has always had like three rom-coms on it….