Warning: Tentacles

He kept the small, torn parchment in his hand and stared at the Whomping Willow, draped in softly coloured lights. This had to be a set up. Lupin had finally succumbed to the dark influence of that prick Potter like Sirius had, and they were going to beat Regulus to a pulp or humiliate him some other way for getting hard over the bath adventure. He should have double checked to see if his brother and Potter were actually spending the night in solitary like the note from Lupin said. Or if the note actually was from Lupin...

He turned back toward the castle without missing a beat - and crashed into Lupin. "Sorry I'm late, Wormtail was being a nosy turd and I couldn't shake him off. You were intending to stay, weren't you? Not fob me off?"

Regulus didn't know how to react. "Are you Moony or Prongs?" he asked, because Sirius would never tell who was who.

"Moony, does that make a difference?"

"Prongs sounds like the nickname of an arrogant wanker - it didn't suit you is what I mean. What's this?" He gestured to the lights with the note that thankfully was from Lupin.

"This, Master Black, is a date. Hopefully. You've been avoiding me for several months now. Honestly, Sirius couldn't have waited a week or two before leaving home? Selfish sod."

Regulus smiled and Remus Lupin kissed him! They kissed beneath the most dangerous tree on school grounds, which did not budge an inch. The inside of Moony's lips felt like Reg's knob toward the end of a bath-wank, warm and wet and heavenly.

"You have to close your eyes for the next bit." Moony's whisper was arousing rather than suspicious, mostly because Reg felt the older boy's hard-on through their robes, so Reg closed his eyes and let Remus lead him down. Down was all he could divine. "Open them now." Reg was disappointed by the tatty room and tattier furnishings. The enormous bed looked like it had been trampled by fornicating unicorns. "This won't do." Remus used a series of non-verbal spells to transform everything from floorboards to ceiling - apart from Professor Slughorn's gramophone. Remus saw Regulus notice it. "Um, he doesn't know I borrowed that. Probably because Sirius stole it first and then I borrowed it from him."

"Does Sirius know...?"

"That I'm using it to seduce his only brother? He'd kill me."

Regulus kissed him. Music came on and they began to dance.

"It took me a while to realise you were really there, kneeling at the end of the tub, because I'd been thinking of you. I thought it was wrong of me to want to touch you like that."

Remus was subtly leading them toward the bed. Regulus followed eagerly, allowing Remus to get on top of him. He clutched Remus' neck, afraid of touching his scars, and let Remus push their robes up, trousers and underwear down, and hard-ons together. Regulus raised his hips and Remus humped against him. Their mouths crashed together irregularly. Regulus was embarrassed by how quickly he came, without warning. He'd expected some anxious build-up followed by a torrent of spunk, not 'oops, done!'

"I'm sorry," he panted in a half-whimper but Remus continued kissing, rutting, and then coming as though it didn't matter.

"You're the most gorgeous boy I've ever seen Regulus. I wish I could stay back another year to be with you."

Regulus clung to him, regretting the months they could have had together. "So this is an Only Date, not a First?"

"I'm afraid so. I shouldn't have led you on like this. There are things you don't know about me. Terrible things." Remus stroked Reg's wrists and kissed his face. "But I couldn't let anyone else be my first and possibly my only."

"But what if I love you?"

"All the more reason for me to keep away. You wouldn't be safe Regulus. I'm sorry."

Regulus could tell he meant that and so didn't get angry. He let Remus walk him to the Slytherin common room and kiss him goodbye.

It was a remarkable kiss, one Regulus would remember for the rest of his life.