Charlotte suffered some trauma of being locked up in a scary pound when she was little. She managed to escape from her cage, but she still has frequent nightmares now during sleep. One day when she sees a cat (named Mousse) seemingly locked inside a home she asks her friends to help her free that cat. It turns out that Mousse is kept inside because he easily gets lost. He is not very sociable and prefers to live inside the house, but once he starts talking he keeps babbling on. He tells the group that he would like to visit an old lady who once helped him find his way home when he was lost. This old lady turns out to be Iori's mother, whose granddaughter Kinako is also visiting to reconcile with her. Charlotte is able to make peace with her past and no longer has nightmares after this incident.