This will be more focused on the mv itself rather than the lyrics 

I've heard from different sources that this song and MV is referencing to the Bible and that Taemin is the Devil

(I found the following info on the internet skdnfks)

• Taemin is shown wearing red, black, and blue. Red is the most important color in the Bible and represents blood. When you think of Jesus' sacrifice, you think of blood. Red also represents love. Black is associated with fear, aggression, evil, death, and rebellion. All of which is associated with the Devil. Blue is the third primary color of the Bible and signifies the Healing Power of God and the Word of God. There isn't a lot of yellow in the video but it's the second primary color of the Bible and is associated with fire and the purification process.
• "This sweetness of the forbidden apple tempts you. The impulse awakens the senses." In the Bible, Eve is tempted by a serpent to eat an apple (also known as the Forbidden Fruit) and gives some to Adam as well. The fruit gives them additional knowledge but it also gives them the ability to conjure negative and destructive concepts like shame and evil. God curses the serpent and banishes Adam and Eve to the Garden of Eden
• Numerous snakes are shown throughout the video
• There's a painting with Taemin covering his eyes at 0:45 (see no evil) and there's a scene of him wearing a mask at 0:53 (speak no evil). I don't think there's any reference to hear no evil though
• At 2:41 when the snakes disintegrate, the pieces somewhat look like black feathers. Ravens are mentioned a lot in the Bible
• Towards the end, there's an image of a giant entrance behind Taemin and his dancers. If you look up The Gates of Hell, you will find out that the two are identical