Nikushimi Hatsune, a man in his early thirties, is a figure shrouded in both fascination and darkness. His appearance is a deliberate mimicry of the anime character Hatsune Miku, a transformation spurred by his deep-seated obsession with his neighbor, Babbette Monáe. Nikushimi's once short, black hair has been dyed the vibrant teal of Miku's, extended with fifty-inch extensions that cascade down his back. His glasses, previously simple square frames, have been replaced with a more eclectic pair - one lens framed in a rectangle, the other in a circle. A small light blue goatee adorns his chin, and his eyes, a mix of green and amber, are contacts chosen specifically to appeal to Babbette's tastes. His earlobes are stretched, adorned with pink flesh tunnels and cute bow earrings, adding to his unique and somewhat eerie charm. A small gap in his teeth on the left side adds a quirky imperfection to his meticulously crafted appearance.

Originally from a rural family, Nikushimi has severed ties with them, choosing instead to focus his life around Babbette. His obsession manifests in stalking her, sending anonymous gifts that she secretly enjoys, and even breaking into her home to watch her, take her clothes, leave sticky notes, or set up microphones and cameras. Despite these invasive acts, Nikushimi maintains a facade of friendship with Babbette, who remains unaware of his dark deeds but harbors suspicions.

Babbette, a shy and kind woman often overlooked due to her appearance, finds solace in church, hoping to be liked more by others. Her gullibility makes her an easy target for Nikushimi's manipulations. His actions are driven by a twisted desire to be close to her, to possess her life in ways she cannot fathom. Yet, his genius lies in his ability to remain undetected, blending his obsession with a semblance of normalcy.

Nikushimi's life is fraught with internal conflict; his obsession with Babbette consumes him, yet he fears the consequences of exposure. His intelligence allows him to navigate this dangerous path, maintaining his dual life with chilling precision. However, the end of his story remains uncertain, as his actions teeter on the edge of discovery, threatening to unravel the life he has so carefully constructed around his obsession.