The song ฝันร้าย (Nightmare) by Finn Play is about someone who is willing to come back and make things right if their partner is not being treated well by someone else. The lyrics talk about how the singer will not give up and will come back to protect their partner if the other person is not there for them. The singer warns the other person to beware because they will come back and be a nightmare for them if they mistreat their partner. The song emphasizes the singer's determination to protect their partner and be there for them, even if the other person is not fulfilling their responsibilities. The lyrics also express the singer's confidence in their ability to take care of their partner, highlighting the things they have that the other person does not. The song implies a sense of power and protection, portraying the singer as a force to be reckoned with. Overall, the song ฝันร้าย (Nightmare) conveys a message of loyalty, protection, and standing up for what is right. It tells the story of someone who is willing to fight for their partner and make things right, even if it means being a nightmare to the person mistreating them.