multiple paizuri — More than one person giving a titjob at once.
multiple penetration — Sexual penetration involving three or more penis/toys into multiple holes or same holes. For two, see double-penetration
Multiple Penises — This visual novel features a scene in which a character possesses two or more penises, either naturally or due to a temporary effect (magic, operation, etc).
Multiple Positions In Background With Fixed Perspective — The game features at least one sex scene set against a single background with fixed perspective while the characters in it change positions. The passing of time can be shown, as well as the items displayed can change place, to show how disheveled the place is becoming over time. Do not use the tag for sex scenes involving multiple positions where every CG is unique and therefore features a.
multiple protagonist — Two or more characters act as the protagonist. Not applied when for gender or origin choice
Mummy — In fiction mummies are undead creatures whose corpses has been mummified and animated. For more information on real life mummies and the process of mummification, read the related Wikipedia article.
Murder Mystery — This story has elements of crime fiction, mainly on the murder mystery front.
Muromachi Era — A game with this tag is set in Japan during the Muromachi era. The Muromachi era (also known as the Ashikaga era) is a division of Japanese history running from approximately 1337 to 1573.
Muscle Growth — This game features a hero and/or heroine that has a sudden increased in muscularity in a very short period of time. This is often the result of magic or some kind of drug.
Muscle Worship — Muscle Worship (sthenolagnia) is a mild form of BDSM where someone touches, rubs, massages, kisses, and/or licks the muscles of their partners body in a sexually arousing manner.