Jihen Episode 11 — Kemono

The episode reveals that in their isolated village, male children were extremely rare and treated as "breeding livestock".

In the present, Yui’s trauma has left him deeply protective and jaded. He views the outside world as a threat to Akira and is willing to use his ice powers to isolate his brother once again, leading to a confrontation with Kabane and the rest of the investigative agency. Kemono Jihen Episode 11

The episode is widely noted for its mature and "triggering" themes, contrasting sharply with the series' initially more lighthearted appearance. The episode reveals that in their isolated village,

To protect the feminine and sensitive Akira from this abuse, Yui took the entire burden upon himself, allowing the village women to use him for years while ensuring Akira remained "pure" and unaware. Kemono Jihen Episode 11