Don't remember the title of manga

[timesen]

Hi I read some chapters of this a while back but for some reason forgot about it until now.

>Manga is about a girl who finds her closet turned into a gate for intergalactic travel.
>A hamster-like alien pops out and decides to help her.
>They decide to make a sorta checkpoint to see which alien can pass and which one not.

Can't remember more but it was a comedy

 

[Buttrider]

Kuro-chan Chi no Oshiire ga Tsukaenai Riyuu?

 

[timesen]

Yes, that is the one. thank you^^
And didn't remember it was ecchi....