Your relationship progress is tracked by "Heart Levels," which unlock specific features: 1 Heart: View interactions and change clothing. 2 Hearts: Ability to apply lotion to the character.
The game features several heroines, with additional characters available through the Sexy Beach 3 Plus expansion: Manami, Esk, Eo, Reiko, and Maria. Expansion (Plus Pack): Adds Maya and Bael. Sexy Beach 3
Access to two sex positions (night only), ability to change hair, and the option to touch the character's chest during lotion application. Your relationship progress is tracked by "Heart Levels,"