This visual novel follows Kiro Nishikawa, whose quiet daily life is suddenly disrupted when three young women from different countries unexpectedly move into his home. Claiming to be his half-sisters, the trio quickly turns his routine into a lively and chaotic household filled with misunderstandings, comedy, and personal interactions. The game focuses on character-driven storytelling and slice-of-life scenarios, featuring multiple endings and full voice acting throughout the story.