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Iruka’s supervising his genin class—his pups—when he feels the all-too-familiar tug at his bond. It's the string on a Koto being plucked, the sound bright and its waves reverberating between two souls tied together.
A soft smile breaks out across Iruka's face, warmth and relief settling behind his ribcage; when he looks out of the classroom window, his mate is there crouched on the tree branch, looking exhausted, but alive.
"I'm home," Kakashi mouths soundlessly, lips quirked up at the corners, before tugging his mask back in place and disappearing in a swirl of leaves.
"Welcome home, Kakashi."