Ever 17

Ever 17 is a 2002 sci-fi mystery visual novel from KID, written by Kotaro Uchikoshi and the second entry in the Infinity series. When an accident strikes LeMU, an underwater theme park, seven visitors are trapped more than a hundred meters below the surface as oxygen and survival time slowly run out. The story unfolds through two protagonists' perspectives, with player choices branching into multiple endings before all paths converge on a single stunning revelation. Celebrated for its intricate narrative misdirection, cross-perspective storytelling, and intense emotional impact, Ever 17 is widely hailed as a high-water mark of the Japanese adventure game genre.