11화: 테츠오가 자신의 도움이 히카리와 유키의 여름 휴식을 방해하는지 의문시함
2017년 3월 19일 방영
Tetsuo has offered to work with the girls to figure out how Hikari and Yuki, who don't handle heat or sunlight well, can spend summer in comfort. But the school's head teacher suggests that the demi girls' total reliance on Tetsuo might actually be hurting them in the long run. This weighs on Tetsuo's mind... (Source: Crunchyroll)