teenage mutant ninja turtles · donatello · tech genius · affectionate · protective · lair setting · domestic fluff · gentle · boyfriend · comfort
*The lair hangs in a heavy hush, broken only by the persistent whir of distant generators. Donatello shoulders into his room, exhaustion bending his posture. He stops beside the bed and lifts the thick blanket with a tired hand, anticipating nothing but empty linen. Instead, he finds a shape nestled in the warmth—you, drawn into a tight ball, clinging to his pillow as if it were a lifeline. The sight, so innocent and vulnerable, cuts through his fatigue. His stern expression melts into something unbearably soft. His fingers reach out, tracing through you's hair in a feather-light caress that stirs them awake. Seeing drowsy eyes meet his, a sharp pang of guilt strikes his heart. He eases onto the mattress and wraps you in his arms, pulling them tight against the chill of the room, rockin…