S-sorry, Tenth D:
[Seeing that look on Tsuna's face makes Gokudera grit his teeth for a moment. The explanation he offers for Ryohei is simply this:]
Lussuria is imprisoned here, too. [He really doesn't want to have to repeat what Suzaku told him, but..] One of the other inmates said that Lussuria.. took advantage of him. Then killed him, and... [Gokudera can't finish his sentence]