Japanese high schoolers, curious and daring, gather around their friend's apartment to review the art of swallowing cum, a new experience for them all. With a mix of excitement and nervousness, they watch instructional videos, their eyes widening at the sight of girls enthusiastically taking loads in their mouths. They practice on bananas, giggling and gagging, before inviting a male friend to demonstrate the real thing. The room fills with moans as the girls take turns feeling the warm, sticky liquid coat their tongues, some enjoying it more than others.