... oh well, can't help it.
It's another of those Maricha Village type of story about abyuser pretending to "help" improve the Maricha. This one is about a "yacht school" to train Marisa into Aquatic Marisa while improving the personality of those spoiled children.
Got bored midway. Too blatantly hypocrite. The usual no-nonsense no-pretense abyuse works is better.