Permanent

Permanent
Senga/Nikaido; Fujigaya/Nikaido, Kitayama/Nikaido
pwp, 1500 words, NC-17. Open relationship, handcuffs, biting, bondage, whipping, knife/blood play
Undressing Nikaido sometimes reveals marks made by someone other than Senga; luckily, Senga doesn't mind.
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