Disclaimer: I don't own Sherlock Holmes and Harry Potter. I don't make money from writing this fanfiction. The story contains spoiler for both Sherlock and Harry Potter. There are quotes from novel, TV series, wiki and other sources. This fic isn't betaed yet. You've been warned.

Ode to Joy

Chapter II

"What?"

Hermione and Ron stared at him.

"I was quite surprised too," Harry admitted. He wasted no time to tell his best friends about his newfound relatives when they met. "The children are ecstatic though to have new cousins."

"What are you going to do?" Hermione asked.

"I'm going to contact them," he answered.

"Mycroft and Sherlock Holmes you said..." Ron muttered.

Hermione looked at her husband. "The names are familiar," she commented.

"He's the guy Percy keeps talking about!" Ron blurted out. "That high ranking Muggle officer."

Oh. Harry remembered now. Mycroft Holmes. He was the one who came up with many ideas about wizarding world. One of the idea actually helped Harry in his capacity as the Head of Auror. To make it easier in their job, Auror Department officially existed as MI13 in the Muggle world and Harry was the director of it. It was really weird at first because they were on the same level outwardly with MI5 and MI6.

"That's good news." Hermione said. "That means he already knew about wizarding world."

"Yeah," Ron agreed, "but how will Holmes take the news that he's actually a descendant of Black family?"

Harry shrugged.

"That remains to be seen," Hermione said. Her eyes widened. "Harry! Do you remember the case a few months ago? When you're asked to gather information about Muggle terrorist?"

"Yeah," he replied in confusion. "Why did you ask that?"

"It's a big case in the Muggle world," Hermione said. "Sherlock Holmes, the world famous detective return from his fake death."

"Oh! I remember that!" Ron exclaimed. "It's on every Muggle newspapers."

They now followed news from Muggle world as an effort to blend in the society. Harry thought it was excellent idea. He still remembered how awkward Mr. Weasley was about those Muggle things he loved.

"Sherlock Holmes's best friend, Dr. Watson has his own blog," Hermione informed. "I think you should check it out Harry. It will be very helpful to gain insight about their character."

"I'll do that," he said.

"I'll ask Percy about Mycroft," Ron said. "Percy ought to know about him. The way he's talking about Mycroft. You would think he's having affair."

"Crouch's phase," Hermione muttered.

The three of them exchanged look and then laughed.

XXXXXXXXXXXXXXXXXXXXXXX

Harry thought about the blog Hermione told him and decided to access it. The Unspeakable at Department of Mysteries had found a way to use electronics in the ministry of magic. They now had special room with computers, fax and everything.

His search yielded a very interesting result. Mycroft Holmes was only listed as officer in foreign affair department but Sherlock was larger than life figure. Dr. Watson's blog was full with the stories of their adventures while major news website had the story of their success. Their biggest case was Sherlock's fake death. Sherlock jumped from the roof of St. Barts hospital to his death and returned again in the furore of the media. Sherlock spent time during his supposed death to dismantle Jim Moriarty's crime syndicate. It was like reading detective novel.

Harry had been asked to gather information and data about Jim Moriarty since obviously there were things that non magical couldn't do. It was no doubt that the order came from Mycroft. He was the big brother who wanted to help his younger brother. It was very fortunate that the big brother happened to be a very powerful and shrewd politician.

Harry wasn't blind. He understood politics very well, even from his school days from his experience with Fudge, Wizengamots, Scrimgeour and even Skeeter. He worked at Ministry of Magic now. While Kingsley was a clean and capable Minister of Magic, office politics still existed and the higher the position was the more you're involved. As much as Harry hated it, his 'Saviour of Wizarding World' status gave him many leeways.

Now...what was the best way to approach Myrcoft and Sherlock Holmes? Harry was certain that nothing would get past them. Two certified genius. It seemed that honesty was the best and maybe some old fashion way.

XXXXXXXXXXXXXXXXXXXXXXXXX

Dr. John Watson stared at the letter in his hand. Who in the world used wax seal on their letter nowadays? The envelope was thick and made of a fine quality paper.

To Mr. Sherlock Holmes

221B Baker Street

It was a letter to Sherlock. Was it from their client? "Sherlock!" he yelled. "You got a letter!"

Sherlock entered the living room a moment later. He looked bored. Well, he was bored since they didn't have any worthy case. That was Sherlock's opinion anyway. For John, Sherlock was too lazy to use his brain for the case that he deemed was beneath him.

"What is it?" Sherlock drawled.

"It's a letter for you," he replied.

Sherlock's eyes narrowed. He snatched the letter from John. "Interesting," Sherlock muttered.

He inspected the envelope, the wax seal, the writing of his name and the ink. Sherlock even went as far as to sniff the envelope. Great. Sherlock probably found out by now that the letter was sent from Vienna based on what the envelope was made of.

"Wrong!" Sherlock barked out.

"I didn't say anything!" John protested.

"You're thinking about it," Sherlock muttered.

"Well, open it!" he gestured.

Sherlock gave him amused smile before he proceeded to do as John told him. Sherlock raised his eyebrow. "It says here that one Harry James Potter wishes to see me and my brother to discuss some family matter."

John blinked. What? Family matter? That wasn't what he expected to hear.

"Apparently I'm his newfound cousin." Sherlock said in amusement.

John blinked again. This was new. He never thought he would see the day when someone would come and say that he was Sherlock's long lost relative.

"Read it by yourself," Sherlock said.

'Dear Mr. Sherlock Holmes,

First, I would like to introduce myself. My name is Harry James Potter. You probably never heard about me before. I sent this letter because I recently came into knowledge that we're related. You're my second cousin. This is a surprise, but a pleasant one for me.

I would like to arrange a meeting with you and your brother, Mycroft, to discuss about this. Is this Saturday, 1 PM convenient for you? The address is Grimmauld Place Number 12, Clairmont Square, the London house of the Black Family. I shall be waiting for you.

Harry James Potter.

Whoa. The paper was even embossed with the coat of arms of the Black family.

PS. You can contact your brother to validate my letter.

PPS. You're welcome to bring Dr. Watson with you.

John blinked.

"The writing is neat but isn't that neat as expected from someone in his position," Sherlock muttered. "Expensive stationery, wax seal... A scion of old aristocracy family who still retains the old way and yet he came to his wealth late in his life. Parents probably dead and he claimed his inheritance when he reached adulthood." Sherlock concluded. "We're going there tomorrow!"

"Aren't you going to contact Mycroft first?" he asked.

Sherlock snorted derisively. "Why would I contact him?"

"Background check?" he said, annoyed. "This letter can be a trap!"

Sherlock shoved his phone in front of John's face. Sherlock had searched about Potter on the internet.

"Isn't this official website of MI13?"

John had heard about it. The organization was new. It was created a few years ago and it was a top secret. Sherlock had opened staff and management page.

Harry James Potter is the current Director General of MI13. He is the first person to have held that post since it was created.

The other result from Google showed that Potter had received the highest Order from the Queen for his service towards the country.

"Faster than that hippopotamus, isn't it?" Sherlock said smugly.

John rolled his eyes. Honestly, Sherlock was never tired of teasing his elder brother.

"Wait, this is your family matter." He said. "I don't think I should go with you."

Sherlock looked at him in the way he always did whenever John said or did something incredibly stupid in Sherlock's opinion.

"Of course you're coming with me," Sherlock said. "Even Potter said that in his letter. Besides that, I'm bored. This should do." He smirked.

John could only hope that Potter would have patience of saint when he deal with one Sherlock Holmes. Potter would need it. Even John needed it. A bored Sherlock was a dangerous Sherlock,

"Oh, this is going to be fun," Sherlock said gleefully.

Author's Note:

Hi! It has been a long time since the last time. I have so many ongoing fics now because once I have inspiration I have to write it down. I also wrote female Harry Potter fics but it seems that not many read it even though it's Mycroft/Harry story.

Thank you for reading and please review.

Happy Lunar New Year 2566 everyone! I wish you all good health and lasting prosperity.