Kaname returns (also naked like the Terminator), and through him we get a fresh look of what has changed and what hasn’t since he went into hibernation. His situation’s a little different from Hikari’s, in that his true love isn’t still somewhere under the sea; instead, his true love is now five years his senior and living with Tsumugu, the two acting like an domestic couple on the same wavelength, what with their well-practiced kitchen maneuvers.
But like Hikari, he both pines and is pined for: Sayu enters the vortex of one-sided loves. Honestly, I’d forgotten she’d taken a liking to him, and remembered there was a surface girl who also liked him, but there’s no sign of her still being in town. But Kaname made his feelings plain for Chisaki, and lets her know that he—and those feelings—haven’t changed. The ball is in Chisaki’s court, though she has two other balls to juggle.
Kaname’s return also makes things tricky for Miuna in her quest for Hikari’s heart. That Kaname returned has increased the chances that everyone else will wake up soon; Hikari’s beloved Manaka included. Tsumugu’s research is also adding fuel to that fire. With Manaka increasingly on Hikari’s mind, Miuna’s chances are as slender as ever.
But when she overhears Hikari and Kaname having a chat by the pool their schoolmates maintained in their absesnse, she’s reminded she’s not alone in liking someone who likes someone else. Just as Kaname’s flame for Chisaki continues, so does Hikari’s for Manakas. Initially this deflates Miuna, but I think it inspires her to stay true to her feelings.
Sayu is similarly deflated. After Kaname left, she vowed to remain alone forever, but when he returns and doesn’t immediately remember her name, she sinks into despair, saying the proper thing to do is to give up on her childhood crush, and either wait to fall for someone else, or settle for someone just to avoid lonliness. Horrified by Sayu’s words, Miuna shouts it out for anyone to hear:
“I don’t care if I’m sick. I don’t care if it’s a manga. Even if it’s gross or pathetic, I’m not changing!”
When Sayu crosses paths with Kaname again, and he calls her by name and treats her affectionately, Sayu admits to herself that she’s “sick” too, and doesn’t want to change either. The ones they love may still be far away, but they won’t stop trying to get closer. To that end, Miuna makes use of her newly-formed ena to lead Hikari to Shioshishio, his home she’s never seen, even if they end up finding Manaka.