Many thanks to everyone who has reviewed.

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Please look at my other stories and let me know what you think ;)

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I move tomorrow - there may not be an update next week - just to let you know.

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Even before the green flames had turned to orange, the boys left behind where advancing on one another.

Sirius called out, "now come on boys," but he soon took cover as fists started being thrown. There was the sound of shirts ripping, stumbling over furniture, chairs falling and lamps crashing to the ground. It was at this point that he left his frame and hid.

After a while the only sound that could be heard was that of harsh breathing and panting as they fought to catch their breath.

Harry was lying on top of Draco, as he gazed down at him he realised that the anger that he held for the boy beneath him had gone. Other feelings stirred within him but he wasn't sure what they were.

Slowly he reached out a hand and ran his fingers gently over Draco's face. He jumped back as what felt like an electrical charge shot through them both.

"What was that?" Harry asked.

Still lying on the floor but now with a slight smile on his lips and a dazed look on his face. He rolled over to look at Harry who was flat on the floor beside him. Leaning over Draco gave a true smile that Harry felt bound to return.

"That, my dear Harry, was the mark of compatibility. Even today it is rare that two people are so well matched. When you touched me all I could think about was touching you in return. We were 'one,' as the expression goes."

"That is all very well but what does it actually mean?"

"It means that when ever we are in a position like this just the two of us anytime we do something new or touch a new place," he yawned. "We will feel the zap like just now, the only down side is that it can be very tiring. Eventually any time we touch we will just feel warm in that place. Let's go and find somewhere to lie down for a nap and I will tell you some more."

Carefully the boys stood and making sure not to touch one another they walked up to Harry's room. When they got there seemingly as one they took of their shirts and trousers – leaving on their shorts and climbed into bed.

Harry turned to lie on his side facing Draco, "tell me more."

Draco smiled up at Harry, "it is a very old form of magic."

Harry interrupted, moving away from Draco "a spell."

Draco shook is head and smiled as Harry moved back towards him. "No, Harry, not a spell, it is more like when two halves of the same person come together, they connect, it is quite rare – when you consider all the people with magic in the world, Even then one of the classic signs is hatred – that has to be overcome before anything else can happen. When we fought down stairs it was as if the hatred finished."

Harry nodded slowly; yes, he thought, it was exactly like that.

He looked back at Draco and smiled; Draco reached out and gently ran his fingers over Harry's cheek returning the gesture from earlier. They both smiled when they felt the zap.

Harry lent forward and kissed Draco, which Draco whole-heartedly returned. There was a double zap this time that left the boys grinning. As they moved back Harry suddenly felt like he had not slept in days. He frowned.

"It's OK, Harry, let's sleep now. We can talk later."

Quickly the boys breathing evened out and they slept. Slowly they moved closer together and became entwined.

After briefly returning to Hogwarts to drop of his robes, Severus hurried back to Grimmuald Place. As he came out of the fire he could not believe what he was seeing. There were chairs upturned and lamps broken, even a blood stained shirt. He hurried over to the portrait on the wall.

"Sirius, Sirius Black, where are you?"

"Have they finished?"

"Yes. They aren't here. What happened?"

Sirius tried to explain what had happened and what he had heard, but the more he talked the more muttered he became until he admitted that he had hidden. He did acknowledge that he unfortunately hadn't understood what had happened in the end.

"I can't tell you what has happened but I can tell you that they are in the house though." He added.

Severus lent against the wall shaking his head. Now what had they gotten themselves into – he would quite freely admit – in the quite of his mind that they really were as bad as one another.

Quickly he sorted out the room and repaired the damage. Quietly he checked the kitchen and then the other rooms as he moved up through the house. Finally having drawn a blank he arrived at Harry's bedroom door.

Carefully he opened the door and stepped inside to see in anyone was there. On the bed were both of the boys; their limbs entwined giving off a gentle glow.

Harry sighed and rolled over towards Draco, his hand and arm touching an area of Draco's back that he had not touched before. The gentle glow flared for a moment. At the same time the dark mark on Severus' arm burned, causing him to flinch.

Stepping out of the room he pondered on what exactly those boys had been up to. Severus thought that literally watching and waiting would be the best policy at the moment. With that decided he went to his room to wash up, upon returning to Harry's room he sat on a chair in the corner and waited.

As the night progressed Severus noted that every time the boys moved against one another the glow would flare and within seconds the dark mark would burn.

Several hours later the boys made signs of waking. As they awoke they smiled sleepily at each other and moved together for a kiss. A gentle coughing sound made them sit up.

Shaking his head in disbelief Severus lent forward and said, "I think we need to talk."

Both boys blushed and nodded, "get up and get dressed and do try not to touch one another, if you can! I will go and start breakfast."

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Thanks for reading - please review.

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More soon :)