Kagen no Tsuki

Mizuki runs from all her problems and is drawn by some unknown force to a dilapidated estate. Deep within the house Mizuki discovers the mysterious Adam, playing a hauntingly familiar melody on the guitar. Melancholy and full of secrets, it seems that Adam, and the house, have a strange, irresistible link to Mizuki. Can Mizuki's boyfriend and a couple of well-meaning schoolchildren uncover the secret of what happened 19 years ago and free Mizuki before the last quarter of the moon falls? (imbd)