Reminder #556 of how much we need a movie of them being an actual couple. Heck, I'd take a single 20 minute OVA at this point. Please santa, I've been good all year, just give me this one gift :¨(
Unfortunately, Sunrise is stubornly sticking to their guns with the whole "their relationship is open to interpretation, I swear". So it doesn't seem likely
Bandai exec said that, the director of anime said they're married later. The people directly working on the series are very much are for the relationship, just unfortunately there's higher ups are being a pain (as usual I suppose). So who knows, the series creators might be counting on there being enough LGBTQ acceptance in coming years that they can do a movie, or OVA. Always hope for the best I say.