[[WMG: ''Planetarian'' is a prequel to ''Manga/YokohamaKaidashiKikou'']]
Both take place AfterTheEnd, both feature RidiculouslyHumanRobots (that are female, no less), the main characters of both series are leaning to cope with loneliness as they [[IWillWaitForYou wait for their owners]], and both main characters develop attachments for those few humans that stick around. Given the circumstances of either work, it should be virtually seamless to fit ''Planetarian'' into the same timeline as ''Yokohama Kaidashi Kikou'' depicting the final stages of the war that lead to humanity's downfall. The Planetarian robot would be an early Alpha-type of robot, maybe the same one buried under the grave Kokone ran into before she entered the library.

[[WMG: ''Planetarian'' also belongs to the same timeline as ''Manga/{{ARIA}}'']]
If ''Yokohama Kaidashi Kikou'' is in the same timeline ''ARIA'' (like the ''YKK'' WMG page suggests) and if ''Planetarian'' also in the same timeline as ''Yokohama Kaidashi Kikou,'' than the rules of logic state that, therefore, ''Planetarian'' is in the same timeline as ''ARIA'' as well.

[[WMG: ''Planetarian'' is in the same universe as ''WesternAnimation/WallE''.]]
The Buy'N'Large Corporation was directly or indirectly responsible for the catalysts of the war. The war itself was the ''other'' reason as to the launching of the Axiom (though Shelby Forthright hid that reason from the unaware public because, you know, war. It'd crush their hopes.) and obviously, the wrecking of the Earth. However, [=BnL=] felt racist and decided to screw Japan (which was the ''only'' area plagued by the acid rain for some reason), thus why there are still some survivor remaining there. We can also assume that [=BnL=] helped in the development of Reverie and that at one point in his long life, WALL•E has taken her corpse into his stash of treasures.

[[WMG: ''Planetarian'' is in the same universe as ''VideoGame/{{Fallout 3}}'']]
I'll let you draw your own conclusions on that one. Or, as someone from Website/FourChan said upon encountering an abandoned planetarium in ''Fallout 3,'' "I was expecting Reverie, but all I got were super-mutants!"

[[WMG: ''Planetarian'' is in the same universe as ''VisualNovel/{{Ever 17}}'']]
Specifically, it's the future that occurs after Takeshi's bad ending. The biological weapons that wiped out most of humanity were the result of Leiblich's perfection of Tief Blau. In fact, Leiblich's influence in most major governments was probably one of the major factors that caused humanity's self-destruction.

[[WMG: ''Planetarian'' takes place at the same time as ''Series/PowerRangersRPM'']]
[[AfterTheEnd Post-apocalyptic setting?]] Check. [[KillerRobot Killer bots that prowl every ruined city?]] Check. The endless rain? Venjix has the ability to bring down endless rain by messing with massive (country-wide) weather systems. And there's something in Reverie that prevents her from getting infected with the Venjix virus -- that's for Doctor K to discover.

[[WMG: The Junker was [[VisualNovel/{{Clannad}} Tomoya Okazaki]] in a previous life.]]
Not even [[spoiler:gathering all light orbs]] could give him the strength for [[Film/PacificRim cancelling the apocalypse]].

[[WMG: ''Planetarian'' is in the same universe as ''Literature/ThereWillComeSoftRains''.]]
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