"My sister looks at me with lewd eyes, and my best friend is also proactive about girl-on-girl sex..." Akane, who lives surrounded by these two, is an innocent female college student who is a little timid about the pleasure of same-sex relationships. She is interested, but she can't take the plunge... As if they could see through Akane's frustration, the two "woman-lovers" draw her into the lesbian world and make her experience an "unknown pleasure" with a lesbian threesome covered in drool and love juice.