Ep. 1: Koyomi and Tsubasa investigate a mysterious stone enshrined in the school garden before Bakemonogatari

1

Prior to the timeline of Bakemonogatari, Koyomi and Tsubasa become involved in an investigation concerning a specific stone. This stone has been enshrined within one of the gardens located at their school. The pair delves into the mystery surrounding this object, seeking to understand its significance and the reasons for its placement. Their exploration focuses entirely on the enigmatic nature of the stone and its connection to the school environment, setting the stage for events that precede the main narrative.