Could there be a ship scene where each legend tries in their own way to wake the MC in the morning. The MC would go to bed naked only on the ship since every person there wears none and he has gotten so good at having sex that even asleep his body can move on its own ensuring none of his legends leaves unsatisfied even when he is asleep. Ex: Uxie, Mesprit and Azelf would be together and the MC wakes up feeling warm and sound of purring (since they look like cats kind of) and notices the blanket is on the floor but he is still warm. Looks down and sees the three covering his body with theirs who also fell asleep after feeling how warm he is.
Another Ex: Mewtwo where she tries to wake him up quietly and fails decides to lay with him in bed but while asleep opens his arms and pulls her into a lovers embrace in bed and holds onto him as well since she can feel safe in his arms and his love for her and lets him sleep since she does not want to ruin this feeling.
Ex: Mew could be that the MC wakes to her eyes peeking out from under the sheets on him and she has his dick in her straddling it to make it bigger.