Kokoro Library's Winter

Iina and Kokoro set out on Christmas Eve with the reluctant Aruto to the city in order to hand out good cheer to the people there that may not know of Kokoro Library. On Christmas Day, Akaha decides to spend the night with Kokoro excited about all the girl time they will get to spend together alongside Iina and Aruto when a blizzard nearly buries the Library the next morning. Everybody cuddling together to share body heat after the kerosene is depleted and the girls' attempt to entreat the assistance from the Tortoise Thief fails. Kokoro reflects upon her initial encounter with Akaha who became lost in the forest while chasing a squirrel; an escort journey later, Kokoro has two new friends and customers for the Library. The Thief defrosting the Library and affording a successful rescue gives way to Kokoro developing a winter illness the next day that forces Iina and Aruto to divide their energies in nursing Kokoro back to health and operating the Library; after Aruto ends up taking Kokoro's ailment unto herself, the fully recovered Kokoro remarks that the cold winters the Library experiences in the mountains are no match for the mutual love she has for her sisters.