The first chapter seemed interesting, and it seemed like the MC was going to find a way to escape the island or get revenge. However, after a few chapters it turned into an only Ecchi plot with some hints of the real story. The story then was made to fit sex scenes into the series. This manga should have been better made into a hentai.
I have noticed this since I began reading manga or light novels, but it seems like if the main characters gets betrayed by someone close to them. The MC will eventually forgive them and make an excuse that their was a good reason for the betrayal. This series obviously has it, so another reason I dropped it.