Once blessed with unique superpowers, a family loses their abilities due to modern day problems — until a mysterious woman changes everything.

Ganta Nakami is a high school student who suffers from insomnia. He meets Isaki Magari, a girl with the same condition. A relationship forms as they share a secret and catch up on their sleep in their school’s abandoned observatory.

Moon Ha-won is an AI programmer and he is the founder of AH Company. He is a consistent person with a good heart. Meanwhile, Han Seo-woo works as a classical music recording engineer. Her life is unstable without a family or house, but she is a positive person.

Growing up, Ding Xiaorou had a pretty normal life but at the age of 17, everything changed. Through a series of misunderstandings, Xiaorou finds herself on the bad end of a stranger’s curse, a curse that dooms her to spend the rest of her life unable to find true love. As the years pass, Xiaorou is reminded time and time again, of the stranger’s curse, as one after another, her romantic relationships fail. Cursed and alone, Xiaorou begins to wonder if she’s doomed for all time. On the verge of giving up all hope, Xiaorou meets Chi Xin and suddenly, everything changes.

A romantic comedy which is about a timpanist witnessing a murder case but cannot remember anything about what happened. With the help from a mysterious guy, she attempts to recover her memories from that day.

Bonded by insomnia, best friends Lisa and Danny stay connected to each other late into the night and find their way through a world of wonderfully weird surprises as their relationship deepens.

To seek revenge Tian Qi enters the palace disguised as a man. Due to her special abilities, she was taken to fancy by the Emperor and became his personal eunuch. As Tian Qi and the Emperor spend time together, the Emperor discovered that she is a girl. It turns out that Tian Qi is the daughter of Minister Ji Qingyun, named Ji Shao. Seven years ago, Ji Qingyun was framed by corrupted ministers and his family was sentenced to death. Only his daughter, Ji Shao survived. The Emperor, having fallen in love with Ji Shao, decides to make her his Empress. However, Ji Shao, who is burdened by her quest for revenge, begins to develop complicated and painful feelings for the Emperor.

Houkigi Shio seems to be a happy and successful businesswoman, who owns an aromatherapy salon. No one knows that she suffers from insomnia -- all because of her exhusband, who cheated on her. Since Shio isn't the only one having trouble to sleep at night, she comes up with an idea of introducing 'Striped Sheep' service. Women, suffering from insomnia, can hire a young and handsome guy, who will help them sleep.

Do Hyun, the captain of the basketball team, is preparing for the championship. Hye In, the team manager, brings Dong Wook, Do Hyun's first love, to fill in for an injured teammate.

Dong Wook and Do Hyun used to go to the same high school. They spent time together and eventually kissed, but Dong Wook had to transfer schools. They meet again on campus and have to play together in a game. They make a bet that if Dong Wook wins, he can officially join the basketball club. After winning, Dong Wook suggests they live together. Do Hyun is unsure, but Dong Wook can only sleep well when they are together. Will they be able to fix their relationship?

A sweet romance begins when a pianist suffering from insomnia finds comfort in a quirky romance novelist.

Song Mi Duo, who's been single since birth, is an aspiring romance novelist who dreams of making it big. During the summer after her high school graduation, she meets Xi Song, a pianist who became famous at a young age. Due to the pressures that he faces, Xi Song suffers from insomnia but is surprised to realize that he can sleep when Song Mi Duo is beside him.

Using Xi Song as her model, Song Mi Do becomes determined to write a love story that will take the world by storm. The two work up a deal that they will both benefit from, thus starting a unique sleeping arrangement as they chase after their dreams.

Aya is a young female model that has always had a recurring dream: She always dreams of seeing her mother kill someone in a house, which is located on the island she used to live in when she was a child. These dreams cause insomnia, eventually leading up to chronic insomnia to the point that she is confused and begins to separate reality and dreams.