In the late 1980s, "eroge" began to stagnate under high prices and the majority of games containing uninteresting plots and mindless sex. ELF's 1992 release of "Dōkyūsei" came as customer frustration with "eroge" was mounting and spawned a new genre of games called dating sims. "Dōkyūsei" was unique because it had no defined plot and required the player to build a relationship with different girls in order to advance the story. Each girl had her own story, but the prospect of consummating a relationship required the girl growing to love the player; there was no easy sex.