Ryohei didn't bother answering Poland's initial question, because he really had no idea. He kind of remembered Yujinn mentioning poison, but had no idea how the Major would have managed that.

"Yeah, Seimei's his boyfriend." Some of his distaste for that fact probably creeps into his voice and his frown deepens. "When I told Hibari why later, he said it didn't matter that Seimei had known about the danger and still done it. And I guess it doesn't matter now. I'm gonna forget about it for Hibari's sake, anyway."

Because he had to live with the fact that Hibari and Seimei were together for as long as that lasted, whether he liked it or not.