Due to the new moon, Sosuke sleeps for an abnormally long time while Murasame becomes strangely quiet. Shino then bumps into a white-haired, red-eyed girl from the Snake Clan, Mizuki Ayane, that occupies the other half of the abode. In an attempt to become friends, Hamaji sends Shino to the other side with a basket of flowers, to which he angers Mizuki Ayane's guardian god, Hibiki. Shino is saved by sosuke, who almost cuts off his arm as a peace offering, and is rescued by Ayane. The four of them start to talk about themselves, which compels Ayane to befriend Hamaji. There is a town festival, however, Hibiki is reluctant to let Ayane out of her sight, but eventually gives her consent to leave the house, so long as one of the Osaki foxes remain by her side.
荘介が眠り、村雨がなりを潜める朔（新月）の日、四獣神家の屋敷を歩いていた信乃は、
和館への入り口を見つける。しかし、和館への立ち入りを莉芳から禁じられる。
その後、信乃は屋敷内で四獣神家のひとつ、巳神を司る観月家の娘で、和館に住むあやねと出会う。
浜路から、同い年のあやねと友達になりたいと頼まれた信乃は仕方なく和館へ赴くが、
そこで観月の守り神、大蛇のちかげに見つかり、無断で入ったことを責められて……。
Пребывая в гостях у Сотоме, Шино, случайно забрел в другую часть поместья, где столкнулся с Мизуки Аяне, избранной священной змеи. Хранитель клана Мизуки, Чикаге, агрессивно реагирует на вторжение Шино на подвластную ей часть поместья. Но, после того, как Шино помог Аяне обрести первого друга, Чикаге сменила гнев на милость.
