「もぉーいぃかい?」夫婦でかくれんぼ。妻アリカが鬼。彼女は鼻がきく。夫コウキは匂いを辿られまいと頭を捻る。ある日、夫から嫌な匂い。アリカは変わっていく夫の 匂いに苦しむ。それ見て、コウキは妹カスミにある頼みごとをする。\"Are you ready?\" Koki racks his brain to try and win a game of hide-and-seek over his wife, Arika, who has a sensitive nose. One night, Arika senses an odd smell in Koki's body. The change in the odour of his body begins to torment her. Meanwhile, Koki asks his little sister Kasumi for a favour.