History YMMV / BeyondTheBoundary

* {{Moe}}: Mirai and Ai.

** The Mini Theater shorts take the Mitsuki/Mirai ShipTease UpToEleven, with Mitsuki constantly referring to Mirai as "cute", and at least two episodes end with the girls going out on a "date" together.

** Opinion on the ending is divided, since many fans are either pleased that [[spoiler:the series ended on a happy note]], or angry since they perceive [[spoiler:Mirai's last minute resurrection]] as an AssPull.
** The ''I'll Be Here - Mirai-Hen'' movie is another breaking point. Many people enjoyed it, and it was widely felt as bringing back the quality to the show that was believed having been lost by the ending of the series (see WinBackTheCrowd below), but people would have liked to see explained the AssPull of the anime's ending, as the film basically pushes forward the plot without giving a clue of why it happened.

* TheyWastedAPerfectlyGoodPlot: There are many plot points (some introduced in the last episode!) that go unresolved or are never explored in depth. Examples include:

* AudienceAlienatingPremise: As some critics noted, ''Beyond the Boundary'' was an exceptionally bizarre choice by Kyoto Animation to try to turn into their next big success. The light novel didn't even win the competition it was written for (it ended without a winner, so the novel and other three were given a honorable mention) and it was clear that the author [[NoEnding wasn't even interested in continuing the series]] (the last volume to date was published in 2013, curiously the same year as the anime's run, and it didn't close any major plot thread). People who knew this in advance were understandably wary of the anime, and is still a reason for EndingAversion between potential viewers or readers.

* EndingAversion: Most fans agree that the anime as a whole is at least SoOkayItsAverage, but the ending of the final episode left a sour taste in many fans' mouths. The whole light novel series is a greater case, given that its ending solved none of the mysteries opened from the very start.

* MemeticMutation: Hiroomi {{glomp}}ing Akihito.

* TheWoobie:
** Mirai.
** Akihito counts as well.

* WinBackTheCrowd: There were a lot of viewers who weren't big fans of the series until they saw Episode 10.

* HolyShitQuotient: Episode 4. '''''[[WhamEpisode What the hell.]]'''''
** After the BreatherEpisode that is episode 6, it steadily climbs, until it goes full throttle for the last ones.

* AssPull: Some people accuse [[spoiler:Mirai's resurrection]] at the end of the series to be this, as it happens suddenly and with very little explanation.
** Averted in ''I'll Be Here'' [[spoiler: considering she has no memories. Akihito also mentions it must've been one last act of defiance by Beyond The Boundary, or a necessary sacrifice for Mirai to come back to life. Possibly both.]]
* AudienceAlienatingPremise: As some critics noted, ''Beyond the Boundary'' was an exceptionally bizarre choice by Kyoto Animation to try to turn into their next big success. The light novel didn't even win the competition it was written for (it ended without a winner, so the novel and other three were given a honorable mention) and it was clear that the author wasn't interested in continuing the series (the last volume to date was published in 2013 and it didn't close any major plot thread). People who knew this in advance were understandably wary of the anime.

*** And then is the debate about whether the reveal of Miroku and Izumi's yomu nature [[spoiler:explained as being possessed by a special kind of youmu]]. While some think it was adequate and interesting, other would have preferred a less "mundane" explanation.
* EndingAversion: Most fans agree that the series as a whole is at least SoOkayItsAverage, but the ending of the final episode left a sour taste in many fans' mouths.

* AudienceAlienatingPremise: As some critics noted, ''Beyond the Boundary'' was an exceptionally bizarre choice by Kyoto Animation to try to turn into their next big success. The light novel didn't even win the competition it was written for (it ended without a winner, so the novel and other three were given a honorable mention) and it was clear that the author wasn't interested in continuing the series (the last volume to date was published in 2013 and it didn't close any major plot thread). People who knew this in advance were understandable wary of viewing the anime.

* CounterpartComparison:
** Ninomiya shares a few traits with [[Manga/{{Naruto}} Tsunade]], a heavy drinker with earth-shattering strength who fights effortlessly without weapons by choice.
** Fujima can be compared to [[spoiler: [[VideoGame/BlazBlue Yuuki Terumi]]. He's a SoftSpokenSadist who works for a seemingly benevolent organisation with a goal that revolves around obtaining an incredibly powerful force ForTheEvulz, who even happens to use attacks similar to Terumi's (however whereas Terumi uses snake chains, Miroku uses worm-like energy blasts). Luckily he's not a tenth as unpleasant as Terumi.]]
** Izumi shares a few similarities with [[Manga/AttackOnTitan Mikasa Ackerman]] in terms of general appearance and preferred fighting style with two blades.

* MostWonderfulSound: The noise Yayoi makes after being kicked by Sakura.

* AudienceAlienatingPremise: As some critics noted, ''Beyond the Boundary'' was a exceptionally bizarre choice by Kyoto Animation to try to turn into their next big success. The light novel didn't even win the competition it was written for (it ended without a winner, and a few novels, ''Beyond the Boundary'' among them, were given a honorable mention) and it is clear that the author wasn't interested in continuing the series (the last volume to date was published in 2013 and it didn't fold the plot). People who knew this in advance were understandable wary of viewing the anime.