Released in the mid-2000s, Hizashi no Naka no Real (The Reality in the Sunlight) is a game that has garnered a quiet, yet persistent, cult following. For the uninitiated, it's an adult flash-based simulation game for the Nintendo DS, described simply as a "simple sex simulation game featuring anime-styled art". However, veterans of the game know that beneath its simple exterior lies a complex and infamously difficult puzzle that has frustrated and fascinated players for nearly two decades.