有一天，由于一种名为“野兽”的生物的入侵，人类平静的生活结束了。当最后一个人类威廉（由新井良宏配音）从沉睡中醒来时，他发现500年过去了，威廉承载着人类延续的最后希望。在这个世界上，只有知道如何使用圣剑的怪物才能与野兽竞争。
Video artist Ryosuke visits the suburb of Furano in Hokkaido, tuikan.cc where his friend lives, in order to shoot a video. His car breaks down and Ryosuke decides to walk to a house and ask for a phone. The person that opens the door is his former girlfriend and first love Haruka. They meet for the first time in 23 years. Even though Ryosuke knows that she is married, he takes her to his video shooting and they get close. Ryosuke leaves Hokkaido in 2 days and he asks Haruka to spend one more day with him.
