Sion no Niwa takes place in the Sion Botanical Research Institute, which is visited by those afflicted with mysterious diseases. The main story is divided into four parts. "Spring: Symbiosis" follows a girl ...

Daeho who has a crush on his friend 'Sion', decides to be courageous and confess to Sion, but then Sion sneer at Daeho's confession which leads to the start of a violent relationship After being hurt by Sion...