Two teenagers trade unrequited love like a deal struck in hell. They use each other's bodies to practice for people who will never want them back. The show doesn't flinch when their arrangement fractures into something uglier and more honest than either of them expected.
Hanabi's been quietly in love with her older friend Narumi for years. Then he becomes her homeroom teacher, and her world gets worse: he's clearly smitten with Akane, the music teacher. The rejection stings, but at least she can suffer alone. Until she discovers another student, Mugi, harbors the same hopeless crush on Akane. In that moment of shared desperation, an idea takes shape. If the people they want are unreachable, why not use each other? Not romance. Not love. Just two people filling the void someone else left behind. Physical, uncomplicated, transactional. What starts as a practical arrangement between two broken teenagers spirals into something neither of them anticipated. As Hanabi and Mugi lean on each other to forget their impossible desires, the line between using someone and needing them blurs in ways that hurt more than loving from a distance ever did. This isn't a love story. It's about what happens when desire and loneliness collide, and two people realize they might be damaging each other in the process of healing.