A new pop song by Thai singer Vid Hiper R Siam about a trans woman who becomes the lover of her childhood best friend is going viral online.

Nearly nine million people have watched the clip for the song on YouTube since it was posted on 9 March.

The song, Transgender Woman Never Cheats, tells the story of a trans girl who fell in love with her best friend, a boy when they were teens.

One night she kisses him, but because her object of affection believes she is a boy, he beats her up.

Years later, after the girl has transitioned, she meets her old friend in a bar after he has been dumped by his girlfriend and the two make love.

However, as the two old friends got matching tattoos as teens, they realize who they are to each other when they turn the light on.

Initially angry, feeling decieved, the man then reveals he missed her.

Watch the video for the song below: