Aya is an orphan. In real life, she finally realizes the harshness of the world. In an accident, Aya comes to a different world and meets a gentle couple. Under the care of the couple, she realizes love. However, things are unpredictable. The death of the couple left behind an infant sister. She ran around with her young sister to survive. However, a young boy she rescued made her life take a turn. Her sister disappeared mysteriously in the bloody storm... She embarked on the road to find her sister, and met different people and different things...