A twin falls into love with his sister and spends forty-nine minutes unable to leave the room they share. The OVA doesn't flinch from how badly this ruins him. It treats forbidden desire not as titillation but as genuine weight, the kind that keeps someone awake at night and makes distance feel like the only honest choice.
Twin siblings Yori and Iku once shared everything, but a gulf has opened between them in recent years. Yori keeps his distance, leaves the shared bedroom whenever possible, seeks distraction in other relationships. The reason is consuming him from the inside: he's fallen in love with his own sister, and the proximity of their daily life has become unbearable. When Iku begins talking about dating and finding a boyfriend, something breaks in Yori's carefully constructed walls. He can no longer contain what he's been burying. His confession comes raw and desperate, a last-ditch attempt to bridge the distance he created and claim what he's been denying himself. Iku's response complicates everything further. She doesn't reject him. Instead, she reveals her own attachment runs deeper than sibling affection, and she'll do whatever it takes to keep them together. What unfolds is a quiet, intimate story about desire and devotion, about two people navigating feelings that society says are wrong but their hearts insist are real.