I'm 100% down for this revenge side plot. Honestly a chapter or two of the adventures the girls are on to show more of what the world is like outside his little bubble of an island is great worldbuilding.
Cecily was so cute and shy around the MC that I forgot she was tough enough to be a pirate captain. Seeing her incinerate the backstabber's head really drove home the fact that she is someone to be scared of
ok now i want an arc revolving the 3 main heroines, and their stories, the protagonist can appear from time to time to distract as comedy confort if the plot get too dark