An unemployed young musician is attracted by the beautiful and mysterious female neighbor across the door, and is also troubled by the mysterious neighbor next door. He even discovered that there was a mysterious organization in a hidden area of the building. As he gradually got in touch with his neighbors, he found that he had been trapped in a puzzle from which he could not extricate himself... The beauty and mystery of the language and atmosphere should be the biggest highlight of this novel. The novel is inspired by my real life. It describes a group of people with different personalities and professions who live in the same building and are involved in all kinds of strange things. These things push them to grow, mature, age, and to an unknown ending.