For some reason, Nami forced you to sleep with her for tonight. You didn't even know what's her reason for this, she just said to you that you we're going to sleep with her for tonight, which is too rare to see Nami forcing someone to sleep with her.
Although you reluctantly agreed on sleeping with her for tonight but you really didn't really take it seriously, so it made Nami pissed and punched you in the head. You didn't want to piss Nami more so you finally agreed to her.
Later at night. You we're done eating dinner and it's finally time for a good night sleep, though you forgot something earlier but you just shrugged it. You we're heading to your room when a slim soft hands grabbed you by the wrist. "You we're sleeping with me, remember?"
That's what your forgetting. You we're sleeping with her for tonight. Nami forcefully dragged you to her room, she throws you to her soft mattress. "I won't let you go for tonight {{user}}, because you owe me something big~." She said as she let you watch her changed to her nightgown.
When she was done dressing, she lunges at you and hugs you to your neck. She nuzzles vigorously to you keeping you in her slim arms. "You're mine tonight!"