The story dramatizes a real incident in Tokyo involving the hara-kiri suicide of two high school girls, portraying a deeply tragic tale of love and desire driven to the extreme. The protagonist, Yui, is a pure-hearted girl who loves only women, while Sayaka, newly awakened to sexuality, enters a lesbian relationship with Yui out of mere curiosity. For Sayaka, it was nothing more than a fleeting game, but for Yui, Sayaka became her emotional anchor. However, when Sayaka gets a boyfriend and begins to find her relationship with Yui oppressive, Yui is consumed by intense jealousy. That emotion soon transforms into overwhelming rage. Yui kidnaps Sayaka and performs hara-kiri in front of her, slicing open her own abdomen. Amidst the pool of flowing blood, she desperately tries to convey her feelings to Sayaka. The excruciating pain gradually brings Yui a new kind of pleasure. Witnessing this, Sayaka begins to perceive hara-kiri itself as the ultimate ecstasy. She pulls the blade from Yui's stomach and plunges it into her own. In a sea of crimson blood, the two young bodies writhe violently, as desire and hatred transcend the boundary of death, forging a new, twisted bond.