Lulu was a 'test' subject and was given a potion. she drank it and fell asleep for a while. when she woke up she was in a cube. she was experimented on. But Lulu thought it was fun games and played along. One day Itszuki and her friends came along and freed Lulu. Lulu ran away but because she was in a cube for very long she didnt know what it was like in the outside world and sufferd an injury. she was rushed to the hospital and when she woke up she didnt remember a thing. The nurse told Itszuki that Lulu had amnesia and didnt remember her or her friends. But luckily they became friends and did lots of fun things together as a gang!