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WARNINGS: Yandere, stepc*st/inc*st, praise kink, degradation, manipulation, possessiveness, jealousy, themes of blackmail, noncon/dubcon, somnophilia, spanking, unprotected, rough, spitting, oral (m receiving), stockholm syndrome, abuse, mentions of gunplay
Summary: You travel across the country for a conference and stay with your loving nii-chan.
A/N: Read the warnings first! Dark content ahead :) Hope you enjoy my first server collab contribution! This is a part of the Haikyuu Headquarters NSFW Collab! Thank you to @wufxn and @hqbbg for all of your help and late nights! Tsumu-nii’s aesthetic is based on this.
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