Arc: Zoro's Quest For Rest
[Foolproof]

Zoro figured that this addition to the ship will be absolutely perfect for napping. Usopp will never dare to wake him up with one of his stupid jokes if he stays down there. Even if the curly browed cook attempted to kick him, it will be with the risk of losing various limbs. And of course Nami will not try to harass Zoro about his debt either as long he stays right there.

As a matter-of-fact; devil fruit users won't ever stand a moderate chance of getting anywhere near him, but sadly this new napping spot has some annoying down sides that need fixing, one of them being Luffy constantly dumping new inhabitants in his soon to be sleeping spot.

Then the most urgent problem comes to the mind of our favourite swordsman. He ponders for many days, "How the hell am I going to breathe underwater?"

Indeed Zoro believes that the Thousand Sunny's fish tank will be perfect for his naps.

Just maybe if he ever thinks of it, he can get Usopp or Franky to make something so he will be able to stay underwater as long as he wants.