- MMORPG
- Mob Protagonist
- Models
- Modern Day (1)
- Modern Knowledge
- Money Grubber
- Monster Girls
- Monster Society
- Monster Tamer (1)
- Monsters
- Movies
- Mpreg
- Multiple Identities
- Multiple Personalities
- Multiple POV
- Multiple Protagonists (1)
- Multiple Realms
- Multiple Reincarnated Individuals
- Multiple Timelines
- Multiple Transported Individuals
- Murders
- Music
- Mutated Creatures
- Mutations
- Mute Character
- Mysterious Family Background
- Mysterious Illness
- Mysterious Past
- Mystery Solving
- Mythical Beasts (1)
- Mythology
- Naive Protagonist
- Narcissistic Protagonist
- Nationalism
- Near-Death Experience
- Necromancer
- Neet
- Netorare
- Netorase
- Netori
- Nightmares
- Ninjas (1)
- Nobles
- Non-humanoid Protagonist
- Non-linear Storytelling
- Nudity
- Nurses
- Obsessive Love
- Office Romance
- Older Love Interests
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