University student Mikado Kasuga lives for his favorite online streamer, Zurich, whose real name is Rihito Nakahara. Convinced that he alone truly understands the person behind the screen, Mikado obsessively consumes every piece of Zurich’s content and believes his devotion sets him apart from other fans. When he finally attends a real‑life event to meet his idol in person, the encounter does not go as he imagined. Instead of a one‑sided admiration, Mikado discovers that Zurich harbors a strange and intense attachment to him as well. Their interaction quickly escalates beyond the usual fan‑idol dynamic; they end up in a love hotel, where Zurich proposes they make a video together. What begins as a fan’s dream soon turns into a claustrophobic, mutually dependent relationship where both parties are driven by possessiveness, jealousy, and a desperate need for each other’s attention.

A two‑year time skip follows, after which Mikado and Rihito have reunited as a streamer duo under the name KasuRich. They deliberately market themselves as a BL pairing to grow their audience, and their online chemistry gradually blurs the line between performance and genuine feeling. To devote more time to content creation, they move in together. Living in close quarters forces both of them to confront the raw, unvarnished reality of their bond: Rihito’s long‑suppressed possessive urges resurface, while Mikado’s fear of abandonment pushes him into self‑destructive choices. The story explores the claustrophobic push‑and‑pull of their codependence, the psychological toll of parasocial relationships turned real, and the question of whether two people who crave each other so intensely can ever build something healthy—or if they are doomed to consume each other.

The setting is contemporary Japan, rooted in the world of live streaming, social media, and online fan communities. The narrative focuses tightly on the two main characters, with their inner thoughts and distorted reasoning laid bare. The manga is a psychological boys’ love story that does not romanticize its characters’ unhealthy attachment but instead examines the painful, addictive nature of mutual obsession.