College student Nao Kanzaki has always adhered to her name's meaning: foolishly honest. However, after opening an unsolicited package containing one hundred million yen, she inadvertently accepts an invitation for the Liar Game. In this tournament, contestants are encouraged to betray and deceive their opponents to gain a massive amount of cash; conversely, losing will incur a lifetime debt. With all hopes lost, her only option left is to seek help from a con artist. On that same day, the infamous swindler Shinichi Akiyama is finally released from jail. This former psychology student is known for single-handedly bankrupting an entire company, and Nao believes he is her only chance at escaping her dire situation. At first, Shinichi is hesitant to commit another crime, ignoring Nao and her request. But after seeing her desperation and persistence, he agrees to assist her. In this fraudulent world, Nao and Shinichi have their own motives. Yet, soon they see the true nature of not only the game, but also everyone involved.

Trying to move on in his life, former professional golfer Kazuyoshi Igarashi arrives at Hinoshima Island for a job at its development center. Expecting the island to be a very rural area with nothing much to offer, Kazuyoshi cannot hide his amazement when he discovers a complete golf course made by the island's inhabitants. Using the seaside terrain to their advantage, the people there have adopted golfing as their hobby. To add to his surprise, Kazuyoshi meets a young girl named Tonbo Ooi, who has been playing golf using only a 3-iron—a notoriously difficult-to-use club. As the former pro gets more involved with Tonbo and witnesses her seemingly impossible shots, he begins to see golf in a whole new light, rediscovering how fun the sport can actually be.

After graduating middle school, Tonbo Ooi sets sail from the isolated island of Tokara to Kumamoto in hopes of advancing her golf career. Using his connections, Tonbo's mentor Kazuyoshi Igarashi is able to convince coach Hajime Udou to train her. While Tonbo initially has trouble showing off her abilities with her peculiar playstyle and inexperience with using a variety of golf clubs, she quickly proves her worth at her course debut by making use of her unique skills. Leaving an impression on Hajime and the people around her, Tonbo is sent to compete in the Kyushu Women's Championship. Met with familiar faces and new rivals, she is determined to dive deeper into the professional world of golf.

When mundane office worker Kiyoshi Adachi turns 30 years old, he discovers that he has gained the ability to read minds due simply to remaining a virgin for his entire life. The caveat, however, is that he must make physical contact with a person to know what they are thinking about. Adachi believes there is no real use for this power until he accidentally hears the thoughts of his coworker, Yuuichi Kurosawa. Charismatic and dependable, Kurosawa is the star of Adachi's team at work, earning praise and admiration from everyone at the office. But deep within, Kurosawa harbors an intense one-sided crush for the gloomy Adachi—a fact that Adachi only learns because of his ability, and knowledge he tries to respectfully disregard. As Kurosawa treats Adachi with kindness and affection he has never experienced before, Adachi finds it increasingly difficult to ignore his coworker's genuine advances.