Disclaimer: The Maiden of Autumn owns nothing.
Cake
Light loved his little sister; he really did. But sometimes, he couldn't help but wince when she asked for his help in math, because he found it hard to explain things in terms she'd understand.
The only good point was that L liked Sayu, and he usually chose to accompany Light to his family's house in his human form, meaning that he could freely converse with L whenever he liked. And more often than not, L grew bored and came wandering into bug Light when he was attempting to help Syau, providing a welcome, (though not-so welcome, in some respects) distraction.
In one such case…
"Sayu," Light sighed, resting his forehead in his palm, "this is really quite simple. Think of it like this: if you have 10 chocolate cakes, and someone asks you for 2, how many do you have left?"
"10." At L's voice, Light looked up and Sayu grinned, settling back into her chair, because she knew that when L interrupted one of their tutoring sessions, it usually meant a good 5 minute break while L and Light argued before L wandered off again.
Light narrowed his eyes at L, not really wanting to be interrupted at the moment. "L. I wasn't asking you. This is Sayu's problem to figure out, so go and do something else and leave us in peace."
Rolling his eyes, L sidled into the room closer, throwing a fleeting grin at Sayu in a gesture of hello before returning his attention to Light. "I'm just saying, that if I had 10 chocolate cakes, I wouldn't give any of them away, even if it was you asking and you were starving."
Ouch. Harsh.
Light blinked, before he swiveled his chair around, crossing his legs and quirking a brow at L. "Okay, well, what if someone forcibly takes two of those cakes? Then, how many would you have left?" Light asked smugly, thinking he had L on that one.
L simply smirked. "10 and a dead body."