Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
In her second year of high school, Umi, who had been sleeping due to an accident, wakes up from a deep sleep for the first time in 16 years. There were her parents, who were a little older than her memory, and a strange sister who was the same age as her before she went to sleep. She was welcomed into a strange house without her memory of the past coming back, but before long she realizes that her parents are trying to hide the truth of the accident. Why? As she traces subtle memories, pieces of memories are gradually revived, trying to recover lost memories. What happened 16 years ago? Who am I when I wake up? She tries to ask something to the same left-handed Yamaguchi? The exciting sister suspense that goes back and forth between the past and the present (now) opens!