In 120 Yen series, each season has a unique heroine. By using the four seasons of Japan to tell the story of two people meeting and getting along through the keyword "120 yen".

Winter A freelance young man and a girl, by chance, board the same slow-moving train to the countryside. Through this encounter with the girl, the young man evokes his long-held childhood memories... The memories of his childhood, when he thought he could do anything, are a little bitter now...? Summer In a sea of people and infinite chances. If there is a so-called "fateful encounter", it must be something special and mysterious. This is the story of a young man and a young girl who met by chance in front of a vending machine, and the story of a summer day between them... Autumn By chance, I saw a fortune telling on TV: "Helping others is the key to luck". So I went out with the expectation of finding the key to luck on my long-awaited day off. However, when he lent a helping hand to a girl in crisis, he was met with anger... This is a small story of two human, somewhat unbelievable... Spring A young man who moves to the countryside meets a young girl here by chance. The young man, who is content with the status quo and tired of reality, and the young girl, who also has anxiety about reality, meet in the country house. The two of them keep communicating with each other, and unknowingly, they are influenced by each other...