L stared at the warm liquid in the cup, almost disbelieving. He then turned his gaze to Raito, unsure. "Raito-kun wants me to... drink this?"
Raito's lips perked a little at the sides, a tired, amused smile. "It's warm milk, Ryuuzaki-san. It's supposed to help you get to sleep." L looked back to the liquid, eyeing it like it was poison. He slowly lifted the cup to his face, sniffing cautiously. His nose wrinkled and he looked back at Raito.
"...There's no sugar in it."
Raito fought the smile off his face, attempting to look serious. "Putting sugar in it would defeat the point, Ryuuzaki-san." He watched L intently, waiting for the older man to drink. He was procrastinating. "If you don't drink it now, it'll just get cold." Raito warned, but judging by the expression on L's face, he doubted the man would mind. L looked back to Raito, the corners of his lips turned down.
"Doesn't Raito have anything more... pleasant?" He ventured.
"I'm not going to give you a massage every time you can't sleep." Raito said, sounding rather amused.
"I wasn't suggesting that." L argued back, glancing at the milk. "Just... not this."
"Just try it." Raito said, pushing the mug towards L's hesitant lips. "If you don't like it, I won't make you drink the rest." L made no motion to drink, but narrowed his eyes.
"How do I know that Raito-kun is not attempting to poison me?" L asked in a last-ditch effort to escape the milk. Raito pursed his lips, amused tone gone now.
"If I was Kira," He started, "I wouldn't need to poison you. And if I wanted you dead, I had plenty of opportunity last night... or the night before..." He glared at L, who almost, almost felt guilty. Almost. Slowly, deliberately, Raito took the mug from L's hands and brought it to his own mouth. His eyes locked with L's as he took a long, deep sip, then handed the mug back to L, the level of liquid considerably lower. "Try it." Raito repeated, staring at L again, unblinking.
L sighed. There was no avoiding it now. He brought the mug to his lips, scrunching his nose and squeezing his eyes shut as he took a tiny sip... and then another tiny sip... and another... L's expression smoothed out and he looked at the white liquid in surprise. The milk was sweet on its own, and the warmth of the drink was already starting to take effect. Eyelids drooping, L shot a look to Raito that was at once guilty and thankful, and Raito nodded, accepting that that was the most that he would get from the detective. L lifted the mug and quickly drained the rest of the liquid. Setting it in the sink, he turned to see Raito smirking at him.
"Raito-kun is being suspicious again." L warned. Raito's smirk widened just a little and he approached L, who leaned back as far as possible before his head hit a cabinet and he couldn't retreat further. Raito leaned in, gold eyes meeting black in defiant amusement, and his lips brushed the top of L's. L froze, eyes wide and disbelieving as Raito's lips moved and his warm tongue pushed its way across L's lips. Slowly, hesitantly, L opened his mouth, but Raito did not deepen the kiss. He pulled back, smirking at the dazed, confused look that had found its way to L's face.
"You had a mustache."