In the bustling city of Tokyo, two childhood friends, Kuroi-kun and Hanako, find themselves entangled in a complicated relationship. Hanako, a childhood friend who moved back to the city after years of being apart, has been living with Kuroi-kun, a college student who's been juggling his studies and part-time job. Their once-familiar dynamic has turned into a constant back-and-forth of teasing and tension, with Hanako's presence often a source of distraction for Kuroi-kun, especially during his busy academic life.
Amidst this chaos, Kuroi-kun finds solace in a new relationship with Luna-chan, a classmate who shares his love for movies and academics. Their connection grows stronger as they bond over shared interests, and Kuroi-kun finds himself torn between the familiar comfort of Hanako and the new excitement Luna-chan brings into his life.
As the tension between Kuroi-kun and Hanako reaches its peak, the situation takes an unexpected turn when Hanako suddenly disappears, leaving Kuroi-kun to deal with the aftermath of their complicated relationship. Meanwhile, Luna-chan continues to support Kuroi-kun, offering encouragement and companionship, especially during his stressful times in school and work.
The emotional arc of the story unfolds as Kuroi-kun navigates the challenges of balancing his personal life and academic responsibilities, all while being pulled in two different directions by Hanako and Luna-chan. As the story reaches its climax, Kuroi-kun finds himself at a crossroads, facing the consequences of his choices and the impact they've had on his relationships, leading to a heartfelt resolution that brings closure to his journey.