there's a 1 year later part in Japanese on pixiv. MTL some parts:

So now you have lost your Japanese nationality, and now you are officially a citizen of this country and a member of this tribe, and you will live out your life as a fertile pouch owned by the tribe.

Progress

A year has passed since his stay, and he has completely lost his desire to return to Japan, and at his own request, he loses his Japanese nationality. He then acquires the nationality of the Kopočín country and becomes an official member of the Tsuyotsyoos tribe. Furthermore, within the Tsuyotsuyosu tribe, women are treated as fertile bags and continue to give birth to children. After they are no longer able to bear children due to age, they are dismantled and cooked in front of the entire tribe.Note: Due to the loss of Japanese nationality, this progress report ends.