 The strictest definition holds that only stories about relationships between two male partners ('M/M') are 'slash fiction', which has led to the evolution of the term femslash.Slash-like fiction is also written in various Japanese anime or manga fandoms, but is commonly referred to as shōnen-ai or yaoi for relationships between male characters, and shōjo-ai or yuri between female characters respectively.Due to increasing popularity and prevalence of slash on the internet in recent years, some use "slash" as a generic term for any erotic fan fiction, whether it depicts heterosexual or homosexual relationships.