My theory is either that the rangers are selfish narcissistic fucks, or that this is a scheme from the UN or something like that to distract the humans from warring with each other and direct the animosity against the alien invaders.
I can't understand how people are like "5Toubun hurted me" and those kind of stuff. Negi was always good in the mystery department, just lacking in the romantic side of things. Hell, why people enjoyed 5Toubun was because the mystery aspect, speculations and theories about the bride (until he...
So Nico will come back to fulfill every regrets (or promises, to look it in a more positive light) they made, eh?
Maybe this manga doesn't have that "kick" to it, but still has a melancholic vibe that I can enjoy to.