Kim Hyeon-mok (김현목) / Lee In-seon-I (이인선) / Choi Tae-joo (최태주) / Lee Gi-hwan (이기환)
评分：
9
剧情：
Tenth graders Oh Dong-seok, Lee Dae-bal and Ryu Ki-seong live in the same neighborhood and go to the same school. They are enjoying their summer vacation. They attend a discussion academy to apply for university and slowly, they start getting interested in women. They open up to porn. They always talk about it and share new porn, getting deeper into the world of it. Everything ......
D / 隐秘＞沉默＞无证。除了表演在线其他各方面基本都是三部中的下乘。剧本的格局前6集铺得井然有序层次丰富，但是之后就愈发依靠某角色犯傻恶心观众和各种极端巧合推动。对比《隐秘》中对严良朱朝阳走向分离举重若轻的处理，就知道这部人物关系的刻画有多么僵硬。整个故事里也没有显明的溢出剧作控制之外的要素，是三部里最死板最贴着探案剧情而缺乏余韵的。不过，这个严良确实是三部里最有魅力的一个。
