Shield of Sister by TSUKUYOMI Promenade - Adult Sex Game

An RPG about the bond of sibling's love.

Fated to destroy the world, his elder sister is his only ally.
Their enemies are the king's guard, the church, the heroes and mercenaries.
When the whole world is against them, she alone protects him.
With her being. With her body.
As they reach for some kind of happiness.