While the perfect getaway for most girls her age might be a fancy vacation with their loved ones, Rin Shima's ideal way of spending her days off is camping alone at the base of Mount Fuji. From pitching her tent to gathering firewood, she has always done everything by herself, and has no plans of leaving her little solitary world.

However, what starts off as one of Rin's usual camping sessions somehow ends up as a surprise get-together for two when the lost Nadeshiko Kagamihara is forced to take refuge at her campsite. And even after Nadeshiko's sister finally picks her up later that night, both girls silently ponder the possibility of another camping trip together.

自恋（长濑智也 饰）是一名刑警，有一个刚刚分手的前女友日暮里惠（中岛美嘉 饰）和一幢背负着贷款的为理惠买的豪宅。日暮里惠的嫉妒心和对自恋的盲目崇拜使得自恋变成了一个名符其实的自恋狂，现在自恋狂失恋了，而他的上司冴木优（荒川良良 饰）居然是一个新婚不久的幸福男人，更令自恋震惊的是，讶木的妻子不是别人，正是自己的前女友理惠。
自恋有一种奇怪的体质，他所喜欢的女性总是会被卷入犯罪事件，或者说，他总是被女性身上的犯罪气息所吸引？这样的他，作为一名警察，在业务上屡屡获得成功，但成功对于他来说，同时意味着的往往就是失恋。痛苦的自恋在酒吧里买醉，偶然结识了专门帮人解决恋爱烦恼的傻瓜四人组，气味相投的他们一拍即合，这四个傻瓜能帮自恋解决困扰他的恋爱问题吗？在恋爱的同时也要打击犯罪！自恋刑警整装待发。

Takashi Natsume, the timid youkai expert and master of the Book of Friends, continues his journey towards self-understanding and acceptance with the help of friends both new and old.

Natsume, while briefly separated from Nyanko-sensei, is ambushed and kidnapped by a strange group of masked, monkey-like youkai, who have spirited him away to their forest as they desperately search for the Book of Friends. Realizing that his "servant" has been taken out from right under his nose, Nyanko-sensei enlists the help of Natsume's youkai friends and mounts a rescue operation. However, the forest of the monkey spirits holds many dangerous enemies, including the Matoba Clan, Natsume's old nemesis.

Stretching from the formidable hideout of the Matoba to Natsume's own childhood home, Natsume Yuujinchou Shi is a sweeping but familiar return to a world of danger and friendship, where Natsume will finally confront the demons of his own past.