Fuck. I hadn't realized they were an actual item. If I recall correctly it simply implied they got together once or twice before, but this looked way more serious.
Also.... At least it was just.... the balls? Right? Could be worse, I guess. I mean, it was still a shot that could lead to hemorrage, and VERY awkward for everyone involved, especially the previous paramour. But at least the thing still works.... I hope. Poor dude.
And holy shit, poor Yuzuha too. The social system hitting her like a brick followed by her learning that all she needed to do was follow what people said instead of trying stuff out for herself.... That just sucks.