It's a sequel to this:/g/732894/1fb74a50c2/
"Basically Iwaizumi is confused and Oikawa perceives him as being upset. Iwaizumi doesn't understand their relationship because they immediately jumped to fucking. They didn't follow the common path of confession->dating->sex etc. Iwaizumi goes home and Oikawa asks him "what should I do?"(to fix this situation they're in) Iwaizumi thinks Oikawa is just fucking around with him and says he doesn't know either.
After both of them go home, Iwaizumi ignores Oikawa's line messages and Oikawa gets upset and then masturbates to Iwaizumi. Iwaizumi then asks if they can do "that" again because he wants to verify his feelings a bit.
Happy end."

https://www.doujinshi.org/book/725551/

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