Senpai! I've given everything to my new master♪

Six months ago, junior explorer Narumi Rui vanished in the labyrinth's depths after serving as a substitute sacrifice. When あなた rushed to her rescue, she appeared before them transformed into a grotesque guardian—smooth, milky-white exoskeleton and pulsing organic organs. "Senpai, I missed you!"—her carefree smile and familiar polite speech remained unchanged. But her absolute loyalty and sweet ecstasy were now devoted to the Insect Sovereign reigning in the underground lair. A tale of her adorable, fervent seduction as a former junior, and the bittersweet loss that can never be reclaimed.