Seven Wishes of May

A story about a girl named Sheena and a naughty ghost who keeps on following her after the incident. The ghost wanted his 7 wishes to be granted because it's the only way for him to leave the world without regrets. Due to the annoyance of Sheena to the presence of the ghost, she was forced to help the ghost in granting his seven wishes. What is those seven wishes? What will happen once she granted his 7 wishes? Will the ghost finally leave? Will she miss him?