3화: 아코와 리코는 케이의 방에서 선정적인 잡지를 발견한 후 인형을 이용해 친밀함 연습을 한다

3

While searching through Keita's room, Ako and Riko find a dirty magazine featuring siblings in a threesome. Wondering if they may end up doing the same thing with Keita, they have a 'practice threesome' with each other while using a dummy to represent Keita. (Source: Wikipedia)