Crack Pairing: This is encouraged by the author, much like in its sister story. There are many, and this has even led to shipping Yuu Akimoto with himself...
Mizore has a bizarre train of thought, and, although she seems to be always right about math, she gets to those answers in the strangest of ways. She also sometimes has difficulty speaking and understanding what others are telling her.
With LPoD and DiOS, it is clear that something is wrong with Shiro but the audience has not been given enough information as of yet. With his past with Einosuke, it is highly implied that Shiro suffers from Post Traumatic Stress Disorder.
Gotta Ship 'Em All: Encouraged by the author, who is a crack Shipper herself and has led to many unusual ships.
Ho Yay: Enforced. Since the first motive divided the ship by gender, there's not much else to ship.
SPACCCCCCCCCCCCCCCCCCCCCEEEEEEEEEEEEEEEEEEEEEeeeeeeeeee Explanation Started by the reviewers. Since the location is space, well...people just started saying spaccccccccceeeeeeeeeeeeeeeee
Shiro's harem Explanation Shipping Shiro is very popular and there's a lot to choose from. Even the story points out that it can seem like this.
Daddy Shiro Explanation Shiro will either date or adopt the entire cast.
Mommy Asuka
Evil ducks Explanation Mizore believes ducks are evil and going to take over the world in Lost Paradise. Then they're suddenly the good guys and heroes in Di OS. But the readers will always know that they're evil.
Seina's stick Explanation Due to Mirabilis's wand in Fo D, many are skeptical of Seina's stick. And, you know, her stick.
Natsuo Inukami Explanation For some reason, Requiem had a really hard time remembering and spelling Keiji's name.
Ship Mates: Since the fan base is still small, there hasn't been really any conflict concerning shipping, especially since many ship multiple characters.
Hi, Kazuhiko! Didn't know your corpse got a part in the story!
All of the executions in the last chapter. Especially Sachiko's.
Whoever the person is in the epilogue, they had a horrible fate. All of their bones are visible, their eyes gouged out, and their skin turned into a liquidy paste.