Aim 2. To conduct a pilot RCT of a social network-based PrEP adherence intervention for TW in Peru. The investigators plan to enroll 6 social network clusters of TW (3 clusters per arm, recruited from 2 seeds matched from 3 geographical areas in Lima, Peru) (total N=90 TW enrolled [15 TW per cluster] to achieve at least N=60 TW completers [10 TW per cluster]) that will be randomized to participate in either the network-based PrEP adherence intervention or a control intervention. The primary outcome will be adherence to PrEP (measured via laboratory analysis of presence of detectable drug in serum, laboratory analysis of presence of detectable drug in hair, and participant self-report). The major secondary outcome will be behavioral risk compensation, specifically the degree to which participants in the two arms do or do not modify HIV risk behaviors while taking PrEP. Behavioral and biological assessments will be conducted at Baseline, 3-month, and 6-month intervals.