...promise me...... A hazy dream comes to visit a sleeping Kyousuke (享佑) once a month. He is unsure if it is a collective manifestation of a past memory but each time the dream plays out the exact same scene. In front of him stood a figure clad in a winter outfit holding his hand, it was snowing. Solely because of his surname Kinoshita, he was appointed by his homeroom teacher to give schoolwork to a classmate he's never met before named Shiromori Yuna (白森夢). Ever since opening ceremony Yuna hasn't attended school. Kyousuke; being the upstanding high school student that he is, accepted the task without a hint of hesitation and decided that he will bring her back to school. On a certain afternoon; Kyousuke was heading towards Yuna's household alone after school ended to give schoolwork like he was asked when suddenly he breaks out in a cold sweat; petrified in place like a solid sculpture as the sensation of dread creeping thoroughly inside him; he quickly turned around to confirm his doubts; yet when he did, no one was there. Can Kyousuke find out what mystery surrounds his hazy dream and who, or what Kezuke is? Will he be able to motivate Yuna in order for her to go back to school?