Recently BTOB's Sungjae posted an Instagram picture of the two rings that he's been wearing, one with two heart-shaped B's and another with the musical clef symbol.

While fans were aware of the one with the two heart-shaped B's because fan club Melody had given it to him as a present for the group's fourth anniversary, they were curious about the similar-looking one with the clef.

SEE ALSO: BTOB share their day in 'Please Stay' MV

On June 2, 'Sinote,' which is a handmade jewelry brand, answered everyone's question with a new blog post.  It included pictures of the clef ring, stating, "We didn't know when we were producing this, but 'Melody' turned out to be BTOB's official fan club name," because the word is engraved inside the clef ring.  

It turned out that Sungjae had personally asked for the creation of the ring out of consideration for his fans.  It was made to match the one they had given to him as a present!  Engraved in it was "Melody Family" and "Yook SJ," his initials, which showed his gratitude toward his fans.  

Understandably, fans were touched upon this discovery! How sweet of him.