She had been friends with Aoi for ten years now. She had known Aoi's brother for ten years now. But now, ten years into their acquaintance, Mikan finds herself in their house, playing a game of mahjong. Her cheeks flush; her neck burning and her hands faintly shaking. Why? Well... because Natsume's hand is caressing her leg under the table, unknown to everyone else - that's why.