The story follows a protagonist who works at a beach house ( umi no ie ) during the summer. The narrative centers on his interactions with a female character (often his girlfriend or a close companion) and a third-party male character who initiates the "NTR" (Netorare) scenario. The term NTR refers to themes of infidelity or "cuckolding," where a character's partner is "stolen" or seduced by someone else. Quick Facts