Akai Hitomi no Serafu is a 1998 Japanese menu-driven adventure game and visual novel developed by BISHOP for Windows 95/98. The gameplay centers on a time-management system where the protagonist must find a way to rescue his partner, Ai, from confinement before the clock runs out. Players navigate a linear narrative by selecting locations on a map and choosing dialogue options to progress. The primary challenge lies in efficiently managing in-game time to resolve the mystery, with the player facing a game over if the time limit expires.