Tape 7, Side B is the tape added by Clay Jensen after the death of Hannah Baker. The tape is a recording of Bryce Walker's confession for the rape of Hannah Baker. It is the final reason on the tapes but wasn't added by Hannah herself.
After hearing Tape 6, Side B, Clay visits the home of Bryce Walker under the premise of him buying weed from him. Once Bryce lets Clay inside his home, he visualises the rape of Hannah Baker and accuses Bryce of raping her. Clay then hits him which makes Bryce retaliate and violently beat Clay unconscious. After waking up, Clay asks for a confession of Bryce's crime. Bryce does confess to the rape and Clay leaves happy, screaming and cheering outside on his bike.
Later in the series, Tony Padilla visits Clay at his home. Clay brings him upstairs and explains that they could bring down Bryce. Tony asks how and Clay shows him the reverse side of Hannah's seventh tape which was originally empty. The side now has the number "14" written on it in a similar style to Hannah's original writing, Clay plays the tape to Tony and on it is the full confession by Bryce Walker that Clay had recorded without Bryce's knowledge. Clay then gives the tape to Tony for him to copy so he can "complete the set". The tape is then returned and placed in the original box that is then given to Liberty High School counselor Mr. Porter.
- Clay writes the number "14" on this side using the same nail polish that Hannah used, bought from Baker's Drugs.