One day, a monkey who sets up a shop in a downtown shopping district as a locksmith with a certain skill participates in a neighborhood association with his childhood friends Yamamoto and Ritsuko. He is tasked with solving the problems of a date club that disturbs the morals of the town. The monkeys started investigating whether the date club was involved in the crime. A few days after the investigation began, the monkey is asked by Ritsuko to help her friend Eri, who works at a date club. At first, it was only about dating, but the owner of the dating club will force Eri to prostitute. Actually, Eri was taken off at the first interview and the video and photos were taken. She is threatened to scatter video and photo data if she doesn't listen. She was a monkey asked to retrieve her photos and data, but he refuses to unlock them because of the theft. However, in the face of her pretty beauty and imminent danger, she decides to embark on her date club.

Monkey reunites with Eri, who is with her son Hiroyuki. When she learns that Eli is raising her son alone, Monkey decides to break into her date club again for Eli. As the monkeys prepare, Eri steals the key alone and tries to open the safe, but she gets caught and is imprisoned. After consulting with Hiroyuki and suspecting that Eri has been captured by Mishima and others who run the date club, the monkey carries out a major operation to rescue Eri and recapture data with Yamamoto and Ritsuko. Transvestite monkey and Ritsuko lie to work and succeed in joining a date club. The monkey tries to unlock the safe while Ritsuko is interviewed and saves time.

Monkeys, Yamamoto, and Yamada came to the sea to enjoy a summer aventure. The monkeys are reversed by two cute gal trio and enjoy the first popular period of their lives. The monkeys make friends with one of the gals, Miki, Kaori, and Kyoko, who stay in the same guest house, and make a promise to fireworks together at night. Ritsuko follows the monkeys and comes to the sea, but the monkeys flirt with Miki and bother Ritsuko. Ritsuko who got angry will go home soon. On the way back, Ritsuko went out for a drink with Takase and Uehara who had been picking up, and Mita, a rich man who joined later, liked Ritsuko. Around that time, the monkeys had a nice atmosphere with Miki enjoying the fireworks together.

Mita puts sleeping pills in champagne while Ritsuko is going to the bathroom, and Ritsuko who doesn't know anything drinks the champagne. And Ritsuko was forcibly invited by Mita to stay at Mita's home. At the guest house, I went to the futon room with Miki, who said that monkeys couldn't sleep, and the two of them had a nice atmosphere. Ritsuko is taken to bed by Mita and is in a pinch of desperation !? Ritsuko, who is weak due to the influence of the medicine, sends an SOS mail to the monkey. Miki and the monkey were flirting in the futon, but Ritsuko sent an email to her cell phone saying "Help! I can do it." After being lost, the monkey is completely worried about the chance of losing his virginity.

Ritsuko finds a groaning child in a car who suffers from heat stroke. A monkey unlocks a girl's hairpin and rescues the child. Ritsuko teaches Miki, who is surprised, that the monkey is a locksmith. After this, Ritsuko went to buy juice and saw Miki and Kaori talking to Takase and Uehara in the shadow. Miki and others were trying to deceive the monkeys. Ritsuko tells the truth, but Miki's lonely monkey doesn't believe the story. And the monkey promises to go to the futon room again in the middle of the night with Miki. However, Miki does not appear at all even in the middle of the night. When the monkey is sick, Kaori rushes into the room. Miki was taken away by someone by car. The monkeys head to rescue Miki, but ...

A monkey who is asked to exchange locks by a female teacher with big breasts, Matsunaga and a beautiful high school girl, and the excitement cannot be suppressed. A monkey who visited a dream paradise, a girls' high school with her bad friend Yamamoto, confirmed the key to the basketball club room. No matter how many times the key is exchanged, it will be stolen. The monkey looks at the keyhole and notices that it is opened with a master key instead of picking. However, she is confused that Aya and Matsunaga, who own her key, do not lend the key to anyone. On the way back, Monkey and Yamamoto went to the music room as soon as they read the article "The Spirit of a Nasty Female Teacher Appearing in the Music Room", the seven mysteries of a high school girl posted in the corridor.

Aya is attacked by someone who has invaded the girls' dormitory. The monkeys rush to the girls' dormitory and help Aya, but after her criminal has already escaped. Aya's underwear was stolen from her room. Around that time, Yamada and Ritsuko, who are watching the monitor, notice a man searching for Matsunaga's desk. The man I caught was Kimura, an art teacher. Kimura seemed to be happy to touch Matsunaga's personal belongings, and he was not the culprit who stole Aya's personal belongings. However, Aya is attacked by someone again, and she is confined in the basement this time.

A monkey and Aya trapped in an underground warehouse in a gymnasium where someone burned briquettes. The monkey unlocks her handcuffs with a wire that has fallen in one corner of her, even though she is stunned. Open the door closed with 10 padlocks from the outside and escape with Aya. From this situation, the monkey is inferred to be the crime of an internal human who is familiar with the school. After this, the monkey asks the members of the basketball club to tell him why the bright Aya became dark. Aya is said to have become a dark child because she was obsessed with the man she was dating. After this, the monkey who noticed the method that the criminal made the master key changes the lock of the basketball club room again in order to arrest the criminal. The criminal who appeared on the scene was an unexpected person.

The monkey was asked by Goda, who lives in a mansion, to unlock the lock of the warehouse that the key could not be found. Paintings, pottery and antiques were stolen from the warehouse. After this, thieves enter the shops in the shopping district in succession, and the monkey infers that the crime was committed by a professional key master based on the situation at the scene. Meanwhile, Monkey, Yamamoto, and Yamada hold a joint party with Minami Nishiyama, an adult who started a part-time job at a fruit shop, and her friend. The monkeys enjoy a joint party with Arasa, who proposes a game with a kiss, but Yamada is informed that a thief has entered the shopping district again. Later, Yamada and the detective come to the Sarumaru key store. The detective tells him that he will arrest the monkey on suspicion of continuous theft of the shopping street.

A monkey told by a detective that he will be arrested on suspicion of continuous theft of a shopping street. The monkey escapes with Minami, who is thought to be an accomplice, and vows to catch the true criminal who made them the criminal. Then, the monkey sets a trap in the shopping district and tries to catch the criminal. However, the criminal cuts Minami and runs away. The monkey asks Mishima, who is familiar with the dark route, to search for a person who has sold art in a flashy manner. The monkey asks Yamamoto and Ritsuko to cooperate in arresting the criminal, tells him that he is suspicious of Minami, and invades the mansion.

Ritsuko witnessed the father hunting of Ryuhei Matsufuji and his fellow high school students. Since then, Ritsuko has been harassed by Ryuhei and his friends. And Eri who was with Ritsuko gets into trouble and gets injured. Ritsuko, who has exceeded the limit of patience, consults with the detective about Ryuhei, but the detective does not try to deal with it properly. Yamada is worried about Ritsuko being threatened. The monkey who knew the situation was furious to arrest Ryuhei. However, Ryuhei is the son of a deputy, and his father has a good face with the police, so the police can't afford it either. After this, Ritsuko was guided by high school students to Ryuhei's hideout. The monkey senses that Ritsuko went to Ritsuko to get a button, and heads for Yamada, Yamamoto and Hideto.

The monkey broke his hands and one leg with a trap set by Ryuhei. The hospitalized monkey is taught the existence of a horny nurse, Cherry Hunter, who robs a male patient in the same room of virginity. Yamamoto, who heard from the monkey, intentionally broke his arm and leg and was hospitalized in the same room as the monkey. One day at midnight, the monkey is called by Fukada, a beautiful nurse. Fukada and her colleague Fujimoto ask the monkey to unlock the shelves that store the charts. There are rumors that the director has concealed a medical error, and Fukada and Fujimoto have been ordered by a medical institution to investigate. Fukada et al. Promise to monkeys anything as a thank you. And when the monkeys headed to the director's room, Ryuhei and three high school students of his minions appeared there.

The monkey escapes from the trunk of Ryuhei's car and heads for Ritsuko's rescue with Yamada and Yamamoto. Around that time, Ryuhei stopped his car at the wharf. When Ritsuko, who had fainted, woke up, she was trapped in the freezer of a ship floating offshore in a tied state. The monkeys arrive at the wharf following Ryuhei and Katsumata. The monkey swims to the ship and finds a door at the bottom of the ship. There were various foreign-made complex padlocks on it. And when the monkey inserts the tool into the keyhole, the time bomb clock is activated. With 10 minutes remaining until the explosion, the monkey unlocks the padlock at a rapid pace.