Translation (from TLWiki):
Shion: Hey, Satoko. What are we gonna do with the marbles we won?
Satoko: We're already as close as sisters, so they wouldn't really affect us.
Shion: Yeah, you're right. That bond is much more precious to us than any treasure.
Satoko: In that case, I'd love to let you have them both, Shion-san.
Shion: Eh!? H-how come?
Satoko: When Nii-nii comes back, you can share them together.
Shion: Eh... Uhm...
Satoko: You like Nii-nii, don't you? But Nii-nii is really slow at things like these, isn't he? Without such a powerful binding force, he would never even notice your feelings for him.
Shion: Satoko...
Satoko: I-I think that... it would be great if you would be my Nee-nee.
Shion: Thank you very much, Satoko. Eeeh! I just remembered! I need to use those marbles right away or mom will yell at me when I get home.
Satoko: Yeah, those marbles can be useful at a time like this.
Shion: Eh... but... which one is which?
Satoko: White, red, white, red... P-probably, the white piece would make you fall for someone. Therefore, Shion-san holding on to the red piece would be okay.
---------------------
Shion: Please... spare me from the tickling machines...
Akane: Kasai, turn it up a little more. It seems that she hasn't woken up yet.
Shion: Stop, stop it~ That devil Satoko~ She mixed up the colors! Next time I see her I'll bury her in cauliflower and broccoli! I'm gonna die~