HHKL-096 - Onii-chan, let's take a bath together! Why are you shy? We're siblings, it's fine. Wait... why are you... getting hard looking at my naked body? Seeing that up close makes me want to...

My younger sister, who is now a high schooler, keeps asking to take a bath with me, and I'm in trouble! I like her, so of course, I want to refuse. But she's so persistent that we end up in the small tub together. Her massive breasts are right in front of me, and because the bathroom is so tight, her chest keeps brushing against my arms! Naturally, I get a full erection, and she catches me!