This is a story about a high schooler named Arden, he is an introverted boy who listens to cassette tapes almost everyday, and was very passionate about music. One day a strange voice spoke to him through a dimensional cassette tape. It is up to him if he wanted to save them from the mortal realm.

In 2020, two celestials had been working on earth for centuries, an angel and a demon. They work together because they're all they have. Eventually the earth that they love, will come to an end, what will they do to save it?