Aori and Nozomi have been best friends since childhood, always together and sharing everything. Recently, a new game called "nipple guessing" became popular between them, where they take turns guessing which nipple is touched. Through this game, their relationship begins to subtly shift. As they play and tease each other once again today, a new emotion suddenly emerges. They start feeling something beyond mere friendship, and before Aori realizes it, she begins uncovering hidden desires she never knew she had. She wants to be choked. She wants her ass spanked... These words transcend mere play, opening a new path in both of their hearts.