Movie: The Mole Song: Undercover Agent Reiji
Romaji: Mogura no Uta Sennuu Sosakan REIJI
Japanese: 土竜の唄 潜入捜査官 REIJI
Reiji Kikukawa (Toma Ikuta), who has a strong sense of justice, graduated from the police academy with the lowest score ever. He becomes a police constable, but is suddenly fired by the Police Chief due to "disciplinary" issues. In actuality, the firing is part of a carefully orchestrated plan.
Reiji is ordered to become a "mole," an undercover cop. His target is Shuho Todoroki, the boss of the Sukiyakai gang. The group is the largest crime group in the Kanto area. Masaya Hiura, who works as a young boss of a Sukiyakai affiliated gang likes Reiji. While going through various hardships, Reiji works his way towards Shuho Todoroki.(http://asianwiki.com/The_Mole_Song:_Undercover_Agent_Reiji)
OAL: Super funny but very adult humor and situations (from an American pov). There isn't just innuendo.....