Omega as their captain - one piece

Luffy was feeling uneasy, he knew it was starting of his heat cycle and what more was that all of them in the ship where alphas, due to his Devil - fruit, he could hid the fact him being an omega, not even his brothers knew about him being omega. Well he was pronounced omega when he turned 18 yrs old.

Luffy walked into chopper's lab as he laid down, he was heading up, as he panted. The reindeer immediately came for his aid, he knew what was going on so chopper started making medicine for it. After he prepared the medication, he gave it to luffy who happily took it.

Luffy slowly started going back to his normal self, he looked at chopper. " thankyou chopper but please dont tell it to anyone. I will tell them when i feel like i cam capable telling." He said .