"Since when did you get so full--" Reimu was trying to sound unafflicted by her girlfriend's treatment, but once she felt those teeth on her nipple she gasped loudly, her back arching on it's own. She hadn't expected that, or it to hurt so much! Even if it kinda felt good...

"W-Wait a minute, you can't just go and do whatever you want!" Though, Reisen had definitely just said she could. And it was clear Reimu wasn't going to fight back, seeing how she was already close to being a quivering mess beneath Reisen.