To me, this is the thesis of Alien Stage. For each duo and in more ways than one.
For Ivantill, Till might never have loved Ivan romantically, though we do have indications he may have. Either way, he didn’t love Ivan the same way Ivan loved Till. He didn’t obsess over Ivan the way Ivan did Till. He didn’t want to accept Ivan’s sacrifice the way Mizi accepted Sua’s sacrifice, but Ivan forced it on him. Till’s love was different from Ivan’s, but does that really matter? It was love, too.
Interestingly enough, Luka has both Hyuna and Hyunwoo’s hearts. Despite everything, Luka lived. Hyunwoo initiated the fight between them, and Luka reacted violently, which led to Hyunwoo’s death. Luka was shot at, and Hyuna took the bullet, killing her. Luka has lived in spite of everything because of their deaths. Hyuna loved Luka, but her sacrifice was one made partially out of revenge. Luka may have loved Hyunwoo when they were friends as kids, but he still killed him. He may have loved Hyuna, but he still hurt her. But it was love. Nonetheless, it was love.
And, of course, Mizisua. Mizi didn’t love Sua in a way that propelled her to sacrifice herself for Sua. Sua’s love was the kind that made it impossible for Sua to live without Mizi. If you recall their mental strengths, Sua’s is extremely low while Mizi’s is strong. Mizi knew Sua couldn’t handle if Mizi died. Mizi underestimated just how much Sua’s death would ruin her, but she was willing to bear it so Sua didn’t have to bear losing her. She might not have been willing to die for Sua, but she gave Sua a gift, too. She let Sua give Mizi her sacrifice. And that’s love. That was love.
Even Mizi’s monologue about Hyuna is riddled with the weight of this theme.
Mizi is bitter because Hyuna fought for so long for humanity—a wider concept than Mizi can perhaps even comprehend, having lived isolated and then in ANAKT her whole life. She fought for something that seemed to mean so much, and then she threw it all away for Luka, a man who Mizi seems to loathe and whom she thought Hyuna loathed too.
Mizi is angry because Hyuna’s love, Hyuna’s sense of justice, required sacrifice. For humans, and for Luka. Mizi’s lingering bitterness over Sua’s decision transfers to Hyuna, because why? Why does your love demand you to die for it for nothing?
But it wasn’t for nothing.
Because even though Sua sacrificed herself for Mizi, and Hyuna risked her life to save her and then died for Luka only ended in Mizi’s death by her own hand—Luka either dying and being replaced or continuing to be imprisoned by the aliens for entertainment—
Even if Hyuna’s love for humanity and belief in their freedom only led to children in museum displays rather than stages—
Mizi still destroyed the competition that ruined her and Sua. She still cemented Ivan’s sacrifice by saving Till.
Hyuna still got her justice. She stopped running. Even if Luka remains trapped, his life still means something.
They all loved each other and the world differently, but it was love too. And it’s never for nothing.