Hey...how about we all have sex?

A group of 4 friends spot two famous girls in their school kissing.
Among them, Rin, Touko, and Mio try to come to terms with the idea of lesbianism.

Are those two going out? Are they having sex!? No, they don't have the equipment for that!

However, Julia has an idea to help them wrap their heads around the concept,
and it will change the face of their relationship forever...