Chapter Text
The good day arrived three days later disguised as a normal morning.
That was usually how it happened.
No dramatic recovery montage. No moment of waking up magically healed. Just Stiles standing in the kitchen halfway through making coffee realizing his body had quietly stopped screaming at him sometime overnight.
Not completely, but enough that his joints only ached instead of burned. Enough that the static under his skin had dimmed back down to a manageable buzz. Enough that food sounded like food again instead of an elaborate social obligation.
Which was dangerous.
By noon he'd done two loads of laundry, changed his sheets, reorganized the bathroom cabinet because apparently he enjoyed suffering, and gone with Scott to run errands because the weather was nice and his body kept tricking him into optimism whenever the pain dropped below a seven.
By six that evening he was sitting on Derek’s couch with his legs stretched across Scott’s lap while his muscles slowly began filing formal complaints.
By nine he was deeply regretting all of it.
By the next morning, getting out of bed felt like somebody had replaced his bones overnight with wet concrete and broken glass.
Scott found him back on the couch at noon wrapped in two blankets staring at the muted television like it had personally betrayed him.
“Oh no,” Scott said immediately.
“Don’t start.”
“You overdid it.”
“I participated in my own life for like six hours.”
“Yeah, exactly.”
Stiles made a tired, aggravated sound into the couch cushion.
Derek looked up from the kitchen table. “Why didn’t you stop earlier?”
Scott answered before Stiles could. “Because he never knows if it’s a good day until after he’s ruined it.”
“Rude,” Stiles muttered into the cushion. “But not wrong.”
Derek frowned slightly. “You felt better.”
“Yes.”
“Then why would doing normal things make it worse?”
Stiles pushed himself upright slowly, wincing halfway through the movement when his spine objected. “Because my body treats energy like a loan application with hidden terms and conditions.”
“That’s not an answer.”
“It’s the only answer I’ve got.”
He dragged one hand through his hair and immediately let it fall again when even that felt like unnecessary effort.
“The problem is sometimes the good day is real,” he admitted quietly. “Sometimes I can do stuff and I’m fine afterward. Sometimes I do half that and my body acts like I got hit by a truck full of smaller trucks. There’s no consistent math to it.”
Scott hummed softly beside him. “There’s some math.”
Stiles looked at him flatly. “Okay, Rain Man, explain the algorithm.”
Scott shrugged one shoulder. “You push harder when you’re scared the good day won’t come back.”
That landed hard enough the room went quiet for a second.
Stiles looked away first.
“...Well that feels emotionally targeted.”