Gakuen Benriya Antique Heart

Synopsis

On the far edge of the school campus, an aged and decaying building has stood abandoned for many years. However, hidden deep inside this dilapidated structure is a significant mystery. After Takahiro and his pals accidentally discover a mysterious being called Saki, their fates become wrapped up in an unforeseen quest. Will Takahiro be able to rescue Saki's world from destruction?