Tentative translation. Will be reviewed and typeset once the work is finished.
P1
Ow, ah.
Though...
this isn't so bad...
I know, right!?
It looks like you're understanding how nice playing with your urethra is
You really know a lot, Arika-san
Of course, I do lots of different stuff.
Though if Mana finds out...
wouldn't she get mad at you?
P2
Like this
Geez!
What are you doing to my Arika-san!!
Nah
She never does this stuff with me anyway
This is Mana-chan's fault
Ahah
But compared to you
you're really interested in this stuff
Ahn
If you spread it so much
you'll be able to see my bladder...
Fufufu...
P3
My pussy is one thing
but having you play around with my urethra
gets me so excited
When you say something like that
It just makes me want to...
get you even more excited!!
Ahhh
I'm cumming
Arika-chan, I'm sorry
P4
You went flying...
Are you okay?
Moeka-san
Let's play around some more