Honor student Maruka Suzuki hides a dark secret and a death wish. She knows the world is full of monsters disguised as adults, and she's recklessly looking for a creature to turn her to mush. When one such "Groan-Up" saves her instead, she sees this rabbitlike being named Mochizuki not as her executioner...but as some serious relationship material! Girlfriend and boyfriend, human and monster, wielder and weapon--how far will Maruka and Mochizuki go, and what other mysteries lie in store for them?