Marin-chan Holstein.ver - Exp/Milk/Pattern Diff (Patreon)

The Holstein girl insists she's just doing exercises on a cushion, but it seems her boobs is much more of a cushion than the one she's riding on.

It seems her boobs was overstimulated, causing her to spray milk with the force. However, given her usually easygoing nature, she doesn’t seem all that surprised.