Shuuji picked up a strange girl in the mountains near his hometown and ended up taking care of her. Iroha had been ‘spirited away’ more than ten years ago and lacks common sense and the ability to converse. Even though this constantly caused him problems, he was enamoured by her innocence.

However, the world is not always a friendly place and her lost time will never be restored. An uncertain future awaits Iroha, but Shuuji is determined to protect her.