* When [[spoiler: Yuka is kidnapped by a mad scientist]], Kyouka wants to go after her alone. The rest of the family, starting with Ouka, slam their fist into the wall as hard as they can, and say, basically, "We're a family, so we're all going to do this together." The kicker is when Hyouka does it, he doesn't slam his fist into a wall, but instead BLASTS THE ROOF OFF OF THE BUILDING THEY ARE IN (because if he had just punched the wall, he'd have dropped the building down on their heads).
** After [[spoiler: proclaiming that he cannot love (Japanese word: Ai) anyone, even though he ''does'' like (Japanese word: suki) Kyouka and treasure their family, Ouka, at the very last episode refers to Kyouka as his beloved wife (Japanese word: ''ai''suru tsuma). [[ItMakesSenseInContext Although only those with some knowledge of Japanese would understand the relevence,]] it is [[SickeninglySweethearts undeniably adorable]].]]
*** In the last moments of the series we see [[spoiler: Kyouka leaving home to complete some unfinished business underground. After the family discovers her leaving, she is somewhat taken aback when they're not distressed, to which Ouka cheerfully replies:]]
--> [[spoiler: '''Ouka''':]] Even if we're apart, no matter what happens. [[spoiler: Kyouka,]] your place to return to is here, isn't that so?