Under the power of the moon, a monstrous creature known as "Gurīdi" threatens humanity. Fighting against it is Tsukikui Shirika, the warrior known as Sailor Eclipse. Trained in martial arts since childhood, Shirika has always been obsessed with defeating monsters and constantly seeks stronger opponents. One day, her senior, Takagi Reiji, appears before her. Reiji attempts to claim her as his own, but Shirika rejects him coldly: "I'm not interested in weaklings like you." Her defiant attitude only fuels Reiji's obsession, and to satisfy his desires, he summons a red moon. Transformed into a Gurīdi, Reiji attacks Shirika, rendering Sailor Eclipse's attacks completely ineffective. This is because Reiji absorbs the energy from every blow he receives. Unable to attack or defend, Eclipse is eventually captured by Reiji and subjected to his physical domination. In the process, hidden, unconscious desires buried deep within her are exposed. Ultimately, this leads to a tragic BAD END.