She's My Friend, She's His Slut 3

It's summer, and romance is in the air—but whether Rin is at a fireworks festival with Satoru or trying to relax in her own home, Osuka is there to subject her to more humiliating sexual training. Meanwhile, Satoru is reconnecting with another girl he used to know, and Rin is afraid that she's about to be left behind. Right as Rin's at her lowest, Osuka decides it's time to crush Rin and Satoru's feelings for each other, once and for all—but despite everything he's put her through, Osuka might not understand Rin as well as he thinks he does...The She's My Friend, She's His Slut series comes to its emotional conclusion!