5. Haechi
Tell me if it counts, cause it wasn't FL, it was another girl (side character)
During the court process, one of the servants was a suspect. The official started to talk about her participation and ripped her clothes to show the tattoo (evidence she was from criminal movement). Then ML took off his Royal clothes (he was the crown prince) and covered the girl.
As for FL, there were some moments with her clothes too but I'm not sure if they fit