Took enough time for me to remember this thread exists.
ParallelWorldsShipping - Ukyo (Amnesia: Memories) x Nerdy McNerdface
It really isn't hard to explain this one. But it's spoilers for a great game, so I'll put it in a spoiler tag:
Spoiler:- Da Explanation:
The lore of Amnesia is that there are parallel worlds, and spirits can travel between them or, in rare cases, allow another type of species to do the same. Ukyo is one of the beings who was allowed to travel between parallel worlds, albeit against his own choice.
CannotLiveWithoutInternetShipping - Lucifer (The Devil is a Part Timer) x Nerdy McNerdface
This one is simple too. Just read the name.