Most women tend to get a bit naughty when they have a few drinks. Initially, they were cautious, but gradually they get closer and the naughty atmosphere permeates the entire room... There's that irresistible moment when they suddenly switch to erotic mode, thinking, "Hmm, I guess it's okay now~." If the switch is flipped for one friend, it spreads to the other. They seem to elevate each other, with one going "Uh-uh♪" and the other responding "Uh-uh♪" in a harmony of delight!