RiNaTest

A story-driven exploration RPG from the protagonist's perspective about a couple, Seiko and Rina, who participate in a 30-day observation experiment at a research facility alongside another couple, Lloyd and Eve. What begins as a routine trial becomes darker when Lloyd proposes that Seiko practice sexual techniques with Eve—while harboring hidden intentions toward Rina. The game centers on NTR (netorare) themes: the protagonist can choose to prevent or permit Lloyd's advances, with each decision branching the narrative in different directions. The game features a 30-day cycle divided into eight daily time periods. Player choices and hidden stat systems determine which of three main routes and numerous sub-branches unfold, leading to 24 different endings. Early days establish the core mechanics and NTR premise; middle days introduce branching storylines and stat-driven progression; later days add progressive body-marking systems and reveal the culmination of accumulated player decisions. A "prevention system" allows the protagonist to intervene against harassment, with outcomes that seem minor but accumulate to influence late-game events and character development. Core mechanics include skill progression (sexual technique levels affecting story variations), a prank system for stat modification, equipment tracking, and a smartphone interface revealing clues about off-screen events. Sexual content is rendered in RPG Maker-style pixel animation with over 300 scenes and 210 animated CGs. The game emphasizes player agency: defensive playstyles lead toward hopeful endings, while neglect pushes toward darker resolutions. Playtime to first completion averages 10+ hours.