YOU'VE GOT MAIL
Something romantic comedy flavored in a post-apocalyptic setting. Or a zomantic comedy, if you will. They've known each other and/or worked together for a long time. I'm open to him being Ellen's agent or something along those lines. Despite an obvious mutual attraction, they never dated for the sake of their professional relationship. Before the virus spread, one of them got drunk and confessed their feelings in a text/e-mail/twitter dm/whatever. The utter lack of a response was understandable given the circumstances to follow. Now that they're staying somewhere with access to electric power, it's possible the message may finally be read. The sender embarks on a mission to steal the other person's phone and delete the evidence of their feelings. Shenanigans ensue. Willing to play the sender or the recipient of the message.