At least,
"Could you add my conditions to the agreement... the ones based on my preferences?" Suga tried to negotiate.
"Your conditions aren't normal, Suga."
Look who's talking?! Suga sighed wearily and spoke slowly, "Just do it on my day off ... You know my stamina isn't as strong as yours. Also, add that Participant A will not do anything to hurt Participant B."
The bastard had the audacity to frown when he heard Suga's terms. He looked as if Suga had said something that, in his view, was indeed abnormal.
"I don't like having a schedule for sex," the lunatic responded curtly. "Not doing anything to hurt you? Huh... I don't want you to misuse that condition."
"How could I misuse it? Fuck, if this is something done by two people, then both should have a say."
"....."
"....."
"... I don't want to."
"Hey!"
"If you look carefully into it, you're the one benefiting the most from this situation."