>>>This reminds me of that old OLD fanfic, Sleeping With the Girls, where
>>>the protagonist finds himself slipping through dimensions but always
>>>wakes up in the bed with a random girl protagonist. Never sexy,
>>>obviously. And then he goes on an adventure in their world.
>>
>>i remember that one.... ed baccerra, wasn't it?
>>
>
>No, definitely not Ed, although definitely influenced by him.
>As I recall the worlds included Tenchi Muyo, Ranma 1/2, Ah!
>Megami-Sama!, and Sailor Moon... and I'm almost certainly missing a
>couple.

Pretty sure two of those worlds were Those Who Hunt Elves and Magical Girl Lyrical Nanoha, with the latter being unfortunate for the MC due to it being one of the few cases where he would wake up next to a female ANTAGONIST and one that canonically never reformed at that.