A new salesman named Kosuke Okuda happens to meet Mao Watarai, a friend from his middle school days. Back then, Mao was called stupid and bullied, but now she is an attractive woman. Kosuke and Mao fall in love and decide to marry, but Mao has a secret.

Yuri Kashiwaga was once known as a genius pianist. One day, she returns to her hometown in Goto Islands from Tokyo. There, she begins to work as a temporary teacher at a middle school and advisor for the school chorus. The chorus aims to take part at a competition. Yuri gives the members of the chorus members an assignment. She instructs them to write a letter with the title of “To myself 15 years later.” The 15-year-old boys and girls write about their secrets and worries.

A mysterious creature destroys 70% of the moon. The creature then warns that if he is not destroyed by March of next year, Earth will be next. The creature also demands that he becomes the homeroom teacher for 3rd grade E class at Kunugigaoka Junior High School. The government is powerless to say no. The creature then becomes the homeroom teacher of 3rd grade E class which consists of failed students including Nagisa Shiota. The creature is called Teacher Koro. Meanwhile, the government requests that the students try to kill Teacher Koro even though he possesses super powers. The government offers a 10 billion yen reward for whomever successfully kills him. The students are confused by the situation, but decide to kill Teacher Koro. When their class begins with Teacher Koro, the students finds themselves having a good time with their new teacher.

Ando can't accept this his daughter Kana committed suicide. Kana fell from the ledge of a school building and died. Ando attempts to find out the truth behind his daughter's death. He becomes suspicious of his daughter's former classmate, Saki. Saki isn't a typical high school student and she aspires to work in show business. She dominates her high school with her charisma.

A world wide electrical outage occurs. Everything that requires electricity comes to a stop. Tokyo is nearly ruined. Yoshiyuki Suzuki decides to escape from Tokyo with his family.

Born and raised in Kyoto, 17 years old Takatoyo spends all his summer holidays in his hometown. However, this time will be different. Takatoyo will experience his first love and first challenges, creating memories that will take him out of his ordinary life.

Rio is a high school student in Tokyo. Her mother tells her she will spend the summer in the countryside. There, she meets Ginzo. He is a high school student and handsome. They fall in love.

Middle-aged Riichi Takamiya drives the midnight bus between Tokyo and snow-swept Niigata, where he lives. Just as the relationship with his younger girlfriend is about to bloom, his emotionally desperate ex-wife suddenly reappears.

A suicidal high school student, a ramen shop owner closing shop after the passing of his wife, and a cuisine researcher stranded in the Xinjiang Uygur Autonomous Region get connected due to a bowl of ramen.

Six horror stories from the "Honto ni Atta Kowai Hanashi" summer special 2018.