* HilariousInHindsight[=/=]HarsherInHindsight: According to TIP #97: "The 'infinity' series will go on forever." Yeah, about that...
** SPHIA, on an island near Hokkaido, was hit by an earthquake in the midwinter of 2011. In real life, an actual earthquake hit Japan right around early Spring of 2011.
* HoYay: [[spoiler:Enomoto]] takes his coffee with HO YAY.
* MostAnnoyingSound: After a while, the high-pitched "mental transference" sound effect gets ''really'' grating.
* NightmareFuel: Bad End #8, in which [[spoiler:Yomogi goes crazy and kills his way through the shelter cabin residents until Kokoro decides she'd rather run out into the middle of a frozen wasteland to die than be left alone with him]]. Also, any of the endings where [[spoiler:Utsumi kills Hotori]].
* {{Squick}}: [[spoiler:Utsumi]] was only fourteen years old when she gave birth to [[spoiler:Junichi]]. [[spoiler:Seiji]] would have been twenty-three at the time. On another note, they're HappilyMarried.