Kusunoki Haru gets talked into trying her hand at running an entertainment agency by a CEO who is an acquaintance. However, she loses everything after it goes bankrupt. All she has left is a struggling five-member (Morinaga Yuki, Shiono Akihisa, Hanazawa Masato, Naito Shuichiro, Honda Kyoya) male idol group which belongs to the agency. In a sudden reversal, Haru goes from a winner whom everyone envies to someone mocked by the people around her. She plots her own comeback and achieves a breakthrough in the entertainment industry as the producer of the group.
Lee Ji Hoon and Choi Woo Seung are two childhood friends who also happen to be preparatory students for the civil service exam, although Ji Hoon has a secret dream to be a singer and songwriter. One day they meet Yoo Hyun Jae, a popular but problematic member of a popular '90s idol group who accidentally traveled through time to the year 2017 from the year 1993. Thus begins the story of passion, love, and friendship among 20s youth in the entertainment industry.
The story revolves around a fictional boy band named A.N.JELL. The management company of the idol group A.N.JELL insisted on adding a new singer to the group as the lead vocal, Tai Jing's voice was hurting. However, the new member, Mei Nan, had to go to the States to repair a botched eye job just before signing the contract. His agent came up with the idea of having his twin sister, Gao Mei Nu a nun-in-training who has to pose as her twin brother and take his place in the group and to stand in for him. The two of them grew up in an orphanage and Mei Nu, who was all set to become a nun, agreed to this charade as she didn't want to spoil her brother's chance of fame which would make it easier to look for their mother.
The management company of the idol group A.N.JELL insisted on adding a new singer to the group as the lead vocal, Tae Kyung's voice was hurting. However,the new member, Mi Nam, had to go to the States to repair a botched eye job just before signing the contract. His agent came up with the idea of having his twin sister, Mi Nyu,to stand in for him and pretend that she was her brother. The two of them grew up in an orphanage and Mi Nyu, who was all set to become a nun, agreed to this charade as she didn't want to spoil her brother's chance of fame which would make it easier to look for their mother.
Miko is a 20-year-old girl. She is pure, but prone to make mistakes. Since her father, who was a composer, died, she stayed at an orphanage with her twin brother Mio Sakuraba. Now she is at a convent dreaming of becoming a nun. But, one day, a strange man named Mabuchi asks her to join a famous band called A*N*Jell, due to her brother being out of the country. Once she agrees, something bigger than a love triangle starts to evolve, along with other people intertwined to this story.
Tae Joon became Jae Hee’s strength during her toughest time, and she leaves the US for Korea to enroll in a men’s physical education high school to help Tae Joon restart his high jump career. Tae Joon announces his retirement from the high jump national team and closes his heart, but his closed heart begins to open after meeting Jae Hee. Eun Gyul is confused about his sexual orientation as he falls in love with Jae Hee who is masquerading as a man. The student-athletes have a fun time training with each other and are not tied down to setting a record or competition.
After watching a high jump competition on TV, Lu Rui Xi was so inspired by a jumper named Zuo Yi Quan that she decides to transfer to his school, which happened to be an all-boys school; therefore, she disguises herself as a boy to get accepted. At the school, Rui Xi befriends Jin Xiu Yi. One day during a friendly soccer match, Rui Xi is knocked unconscious by Xiu Yi. Quan carries her to the infirmary and realizes that Rui Xi is in fact a girl! However, Quan keeps her identity a secret. At the same time, Xiu Yi starts to question his own sexual orientation when he finds himself having feelings towards Rui Xi.
Ashiya Mizuki has just come back to Japan from California where she was raised. She fell in love with Sano Izumi, a hopeful high jump hero, who has quit after an accident. As she wants him to go back to the sport once again, she enters the same high school as a boy. With a short hair, flattened chest and lowered voice, she starts sharing the same room with Sano.
The special took place half a year after the series' end. With Osaka Gakuen getting ready for an upcoming Valentine's Day event, Sano and Nakatsu reflect on the final week of their last summer vacation, which falls into the timeline of the original series between episodes 7 and 8. The special also includes a graduation scene and addresses the relationship between Mizuki and Sano.
This hilarious comedy follows the chaos, troubles, and friendship at a boys' boarding school after a girl disguised as a boy joins. Ashiya Mizuki has just come back to Japan from California where she was raised. She fell in love with Sano Izumi, a hopeful high jump hero, who has quit after an accident. As she wants him to go back to the sport once again, she enters the same high school as a boy! With short hair, a flattened chest, and lowered voice, she starts sharing the same room with Sano.
This hilarious comedy follows the chaos, troubles, and friendship at a boys' boarding school after a girl disguised as a boy joins. Ashiya Mizuki has just come back to Japan from California where she was raised. She fell in love with Sano Izumi, a hopeful high jump hero, who has quit after an accident. As she wants him to go back to the sport once again, she enters the same high school as a boy! With short hair, a flattened chest, and lowered voice, she starts sharing the same room with Sano.
The special took place half a year after the series' end. With Osaka Gakuen getting ready for an upcoming Valentine's Day event, Sano and Nakatsu reflect on the final week of their last summer vacation, which falls into the timeline of the original series between episodes 7 and 8. The special also includes a graduation scene and addresses the relationship between Mizuki and Sano.

