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Go to the BL "Dawn of the Dragon" Chapter 28. Not only did the seme squirt inside the uke, he also experienced dry orgasm. And it's all gloriously uncensored as well. It was hot as fuuuuuk. I wish more authors drew semes like that during sex. Completely messy and disheveled overtaken by pleasure rather than just smiling there or looking smug. Semes making O faces is so hot.
There's also one squirting in "Kobi no Kuoujin" Vol 2 Ch 13.6. Yakuza seme squirted inside his uke. Messy but hot af shit.