-eng- Nomadic Tale -harvest Elysium- -v1.0- Unc... -

It looks like you're referencing a specific adult visual novel or interactive story: (likely the "Uncensored" version).

Kaelen arrives at the outskirts of the walled town Veridian Holt , which is slowly starving because their last harvest was too blighted to eat. The town's elder offers a desperate bargain: if Kaelen's caravan will guide a small expedition into the blight-fields to salvage a Heartwood Seed (a magical crop that can purify land), the town will share its water source with the nomads permanently. -ENG- Nomadic Tale -Harvest Elysium- -V1.0- Unc...

You play as Kaelen , the last wandering caravan master of the Silent Sands tribe. Your people are nomads who know ancient purification rites lost to the settled city-dwellers. It looks like you're referencing a specific adult