You have to take a quest in Boloyam and follow it through.
Modnoco
Recent community posts
After one of the first quests you can buy a Camping Set at the shop. Once you have it, you'll be asked to camp if you stay outside after the time of day has changed to "Evening". You can't just camp, though. So if you're still at "Noon" you'll have to use "Pass Time" or fight a monster until it is time to go to bed, basically.
I guess I put that a bit awkwardly.
When you get to clean the stalls, at some point your character decides to undress because she is so hot after that exhausting work. You don't have a choice to NOT do it.
So, no matter what armour you wore when you started the quest, for the moment she will take it off.
She'll just not put it back on again (automatically) after the quest is finished.
You'll have to put it back on in your wardrobe.