If you're looking for manga similar to Sweet Holiday, you might like these titles.
A couple goes to a hotel on an island. On that stormy night, a guest falls from her room and dies. The couple has to solve the mystery!
15 beauties drifted on a desert island. Unfortunately, they aren't the only ones on the island. Will they be able to escape the island?
Man and women who doesn't know each other on an uninhabited island, they're free to have erotic situations! Romance! Survival! Search for your fated lover... now, disembarking!
12 men and 12 women are kidnapped and left on a remote island, where no laws exist. If they survive on this island for 10 months, they win $500,000. This is the story where true human nature is revealed. Welcome to project Utopia.