4月1日，俊勋（由兰井泰介饰演）在一所私立交叉学校学习，拥有与普通人截然不同的能力。他能看到别人看不到的东西，而众生的奇怪形状让他感到困惑。一次偶然的机会，俊勋踏入了一座既存在又不存在的建筑，遇到了被称为“次元魔女”的石原裕子（星饰演）。
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.
