Ikkakujuu wa Tsuranukanai!

Emuko is a young woman in her twenties who has chosen to remain a virgin and has never been in a romantic relationship. She lives with a unicorn named Sea Urchin, a creature naturally drawn to virgins. Sea Urchin is deeply fond of Emuko, but she occasionally questions whether she is missing something by avoiding romance. Emuko also begins to wonder if Sea Urchin's affection for her might be excessive.