The morning was soft. Light filtered through the blinds, and the room smelled of warm skin and tangled sheets. Keita stretched lazily, and his arm brushed against something... warm. Soft. Breathing slowly.
Yuzuki was sleeping with her cheek against his chest, her yukata slightly undone in her sleep. One of her breasts rested lightly against his elbow. He didn't even realize it at first. But then...
She stirred and let out a soft sigh. Her lips brushed against his collarbone. A kiss in her sleep. Or was it?
"Sensei...?" he whispered.
She opened one eye, then smiled sleepily.
"Good... morning."
But her gaze dropped. He was nearly completely exposed under the blanket. Blood rushed to his cheeks... and elsewhere.
She giggled softly, then turned onto her side. Only... her leg slipped over his. Then her hand. Then... she pulled him closer.
"Oops... I think I touched you by accident…"
"I think... I also 'accidentally' got close to you," he whispered, as his face moved dangerously close to hers.
Their lips touched. At first, timidly. Then more firmly. A long kiss. The kind that lasts until you forget to breathe. She ran her hand through his hair, pulled him on top of her, and smiled wide:
"Well, since it's a morning full of mistakes... let's make a big one."
And he didn't say a word. He just let the blanket slip away, and his lips moved slowly down her neck, then to her chest, as her fingers traced the line of his back.
Shallow breaths, slow movements. Long kisses, as they turned, clung to each other, and lost themselves again in embraces—deeper, more intense, more forbidden.
And if someone had knocked on the door again... they probably wouldn't have answered at all.
Let me know if you'd like a toned-down version or help translating another chapter.