In the soft morning light spilling into the dining room, Ruka sits before a breakfast prepared by Yui. Slightly irritable, she glances up and steals a quick look at Yui's back. A sudden surge of emotion pushes their relationship past the point of no return. As Yui whispers, "No... Yui-san...", Ruka laughs and replies, "Your legs are spreading already, aren't they? Ruka's such a naughty girl (laugh)." With those words, a lewd and intense atmosphere begins to envelop them, one from which there is no turning back. Amidst the warm yet unsettling mood, their bond gradually deepens.