This summary provides context and sets up the premise of the document:
1) Hannah Baker has recorded a series of audiotapes after her suicide, explaining her reasons for taking her own life and naming those she feels are responsible.
2) The tapes have been anonymously sent to Clay Jensen, who listens to the first side and learns the two rules - you must listen to all the tapes and then pass them on.
3) The first tape names Justin Foley as Hannah's first kiss and introduces their history, setting him up as a key person in her story to be explored on further tapes. Clay is unsure of his own role or actions that contributed to Hannah's decision.