Summary:
When Shisui died, he expected to just be...well...dead and floating in somewhere, not being able to move, feel, see or hear anything.
Well, turns out he was wrong.
Suddenly, he found himself getting a job in a space called Blankness, and his role was to calm down any violent 'visitors' that popped up now and then: he would either make conversation with them to make/help them move on or forcefully subdue any resistance.
Honestly, it's not surprising that he got said job to be the Guide, as he was the only one who decided to stay in the Blankness.
He thought he would be alone forever, but then, a familiar brunet and another man with two a hair of two colors popped in.
They became friends as they clicked immediately, and the rest was history.
After that, well... they got themselves a handed vacation to visit world (they were still on Vacation World #1) or universes that they like.
...And that was when things got a teeny bit chaotic.