While this exact title does not currently match a mainstream, licensed anime or manga series as of 2025, it strongly follows the naming conventions of Japanese . Titles with the "Sennyuu Sousakan" (Infiltrating Investigator) trope are popular in niche genres, particularly those involving undercover agents, corruption, or psychological traps.
The story begins in medias res . Reika is already inside the Guild’s floating casino headquarters, posing as a high-roller. But the Guild knows a mole exists. Every episode becomes a chess match: Reika uses lipstick cameras, coded messages hidden in mahjong tiles, and parkour through ventilation shafts. But the Guild’s security chief, a former undercover agent himself (a dark mirror), suspects her.
"Sennyuu Sousakan wa Zettai ni Makenai" translates from Japanese as "The Infiltrator's Mission: Absolutely Won't Lose." If this is related to an anime, manga, video game, or another form of media, here are some general steps you can take:
