Nvm, are you fcking kidding me. They don't end up together. I swear I'm gonna need an alternative ending or an actual true end. They share a tragic kiss then she disappears/ascends. Then somehow, several fcking years later Keita and Akane have a kid together and that kid is like what, four? Kuro appears. Wtf, what the actual fckin hell.
Sorry, it's a spoiler and I can't spoiler tag it. If I do, the text won't appear for some reason, like it doesn't really appear even the spoiler box.
Anyway, please, could someone recommend me similar manga (that includes both the relationship dynamic and action, if only the romance part and no action, that's fine too)? It's been a long time since I had read a subtle romance with the dynamic between Kuro and Keita, so I was really invested.