The Tale of Yuna is a side quest in Ghost of Tsushima involving Yuna.
Your task is to help Yuna with the Mongols terrorizing the Otsuna region.
Here’s a walkthrough of The Tale of Yuna (part 1) in Ghost of Tsushima.
Look for Yuna
To begin the quest, look for Yuna near the Otsuna border. You’ll see her near a small campfire.
After meeting her, follow Yuna.
Speak with the villager
You will reach an inn with Mongols. Talk to the villager who seems to be hiding.
Kill the Mongols
The Mongols will come out of the inn. Take out all of them.
Speak with Ichi
After eliminating the enemies, the inn owner Ichi will come down.
Talk to her.
Speak with Yuna
Once you’re done, go out of the compound and talk to Yuna.
You should get a Charm of Rejuvenation upon completing the quest, among other usual rewards.