第 4 集: Setsuna 陪同 Karen 前往本島進行母女重逢，背後卻隱藏著秘密
2018年7月22日 播出
Although it was by Karen's request, Setsuna does something unthinkable. They go to the mainland so that Karen can escape and go to see her mother. Why did she cry while Setsuna watched over her? Meanwhile, Sara is getting close to something. (Source: Crunchyroll)