At the moment when the delicate relationship between sisters unfolds, an unexpectedly erotic turn of events occurs. As the younger sister cries out, "Stop! Stop! RUKA isn't ready yet!", the older sister replies, "RUKA, I'm sorry," expressing genuine concern and care. Their interaction reveals the deep bond between them. Still, the scene continues with both sisters' moans echoing, building an intensely sensual atmosphere. This work perfectly captures the unique emotions that arise between sisters, combined with the irresistible allure of an erotic video. Enjoy the continuation in PART 2.