ZenTan
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I do not own Kimetsu no Yaiba nor its characters
Contentment
Tanjirou brushed a few locks of hair and combed it back before running his fingers along the soft strands. A grin accompanied by some dust of pink highlighted the high point of his cheeks as Nezuko - in her small form, again -, tucked a flower between his strands, eyes twinkling with happy smiles.
They looked so content in each other's company that Zenitsu didn't have the heart, the nerve, to interrupt. His initial intention to call the name of his secret crush died down the moment the sibling's comfortable zone revealed.
A wave of laughter snuck into his ears, vibrated a warmth it carried along with the steady increase of heartbeats. Zenitsu couldn't help but stare. The corner of his lips slowly turned up.
He sat down on the wooden platform, just a few feet outside the siblings vicinity. The ears instinctively tuning out any other sounds except the ones in front of him. The smile stayed.
Zenitsu didn't mind waiting.