Young married freelance writer, Memo Matarou, notes everything he finds interesting in his electronic organizer, but loses it after a night out drinking. Moguro returns one to him, but it although it is not his, Memo finds the data inside useful, especially the contact details of many women. Moguro later returns the original organizer, but Memo had already downloaded the address book and begins a series of sexual encounters with the women listed in it. Moguro punishes him for his transgression, so when he returns home, Memo finds that Moguro has switched his beautiful wife Tsukiyo for an unattractive woman and her demanding son.