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.

Kengo and his lover Ai are in a relationship for two years, but they never were intimate with each other. Even when Kengo's parents go on a trip his suggestion is rejected by Ai. Kengo tried to summon a love angel with a spell, but failed with it. As a result, love of this world was confined and in order to save love he needs to enter the spirit world, interact with its inhabitants and rescue love withing a limited time period.