Jungkook hummed Euphoria and the reminiscence of Jimin still fresh in his mind. From the time when swimming back to Atlantis all he could think about was the human prince he grudgingly left behind. He was thinking about him repetitively and he couldn't help but wonder if the other was thinking about him just as much.

For the longest time he had known what a heart song was. It was a song that a mer made for their mate and if both songs sung together they'd create a beautiful masterpiece. All mers had a heart song. His parents had one and once when he was little they sung small verses to his brothers and he as lullabies. His mother said it was the love from the heart song that created his beautiful sons.

It took him time to comprehend that the song he sung to Jimin was his heart song. Jungkook contemplated if Jimin likes to sing, maybe he would hear a composition written just for him by the human? That meant they would be seeing each other every so often which made the mer prince smile.

Jungkook plucked a flower and put it behind his right ear as he swam out of his chambers and headed for the corridor. He heard Hoseok's chirpy voice emanating from the music room in the palace. He typically found his friend here. Jackson was nowhere in sight so he found that as a plus.

Eum-ag-ui lideumdaelo

Geujeo mom-i ganeundaelo

Ulin dalbich alae shadow

Fall in... fall in...

Hoseok sang as he swam around the music room.

"Hobi-hyung!" Jungkook called out to his friend. Hoseok spun to see his friend.

Hoseok swam towards Jungkook, "Hey Kookie! What did you think about my song?"

Jungkook elevated an eyebrow, "Was it your heart song?"

Hoseok moped and put his arms behind his back, "Um...I'm unsure, honestly. It's kind of been stuck with me for a while now. Finally putting the verses all together though."

Jungkook knew there was someone that his friend had his eyes on. Jungkook was aware for the reason that the merman Hoseok was attracted to was his blue haired brother, Taehyung. Jungkook didn't know how he felt at first about his best friend loving his brother. The idea of Hoseok becoming his brother did bring a smile on his face so he recognized the relationship joyfully.

Yet neither mers manned up and told each other anything. Jungkook was battling the impulse to just put them in a room together until one of them came clean. Jungkook felt like it was all long overdue. If Hoseok was anxious about how the king would feel, Jungkook had the answer. His father had no problem with Hoseok. Namjoon was gratified that Hoseok was good friends with his younger son.

"Why haven't you told Tae Tae how you feel about him?" Jungkook interrogated.

Hoseok's cheeks went crimson, "Kookie! There's nothing...There's nothing going on between us, I swear."

Jungkook rolled his eyes dramatically, "Trust me I'm well aware that nothing's going on. That's the issue, hyung!"

Hoseok shrugged, "I...If Taehyung felt anything he surely would've said something by now, right? I'm no mind reader."

"He's just as crazy as you for not saying anything," Jungkook didn't defend his brother. "You two would be happier if you two just talked."

Hoseok was dispirited, "I'm not sure, Kookie...I don't know."

Jungkook tried thinking of what else he could say that'd be positive to his friend. He came up with something. "Look at Jimin and me, then at Tae Tae and you. Trust me, Hobi, you have nothing to worry about. Just have a little faith." He started swimming away.

Hoseok called out to his red tailed friend, "And where are you going?" He hoped nowhere near the human prince.

"I'll be joining my family at breakfast while thinking about a certain human prince." Jungkook winked at his friend before going off.

Hoseok shook his head. Jungkook was in love.

                  ✯✯✯

All the way through the whole morning Jungkook was grinning with glittering eyes. Namjoon couldn't help but feel fretful. The little tune his youngest son was humming reminded him of his heart song to Jin. Just by the joy radiating off of Jungkook demonstrated that there was more to his son's bliss.

Yoongi, Taehyung and he had their eyes on Jungkook all through breakfast. Even Moonbyul declared that this was all too familiar with her before the three princes had been born. Namjoon knew the mermaid was referring to Jin and he. Namjoon had no comment.

Jungkook was the first to leave the dining room. Namjoon had been taken back when his son had pecked his cheek and swam away with the same cheerful tune coming from his lips. Namjoon was trying to comprehend what was happening.

"What is with him?" Taehyung questioned, feeling it rather odd by Jungkook's out of the blue euphoric demeanor.

Yoongi scoffed, "He's got it bad."

Namjoon looked at his eldest son, questioning what he meant, "What? What's wrong with Jungkook?"

Yoongi sent his father an are-you-joking-me look, "Appa, Kookie is in love with someone."

Namjoon gasped at the thought. It made sense. This was starting to really feel like old times. He his lips. Who could Jungkook be in love with?