Set towards the end of World War II, Nomura (Masatoshi Nagase) is a writer who is in despair. A woman works in bar and is a former prostitute. Many years ago, her father sold her to a brothel due to the family’s severe financial hardships. The writer and the woman then agree to live as husband and wife until the war ends. The woman doesn’t feel sexual pleasures due to her past, while the man lusts for the woman’s body. Meanwhile, Ohira (Jun Murakami) fought for Japan in China. He participated in unconscionable acts against civilians in the name of war. He returns to Japan with only one arm. Ohira then begins to prey on innocent women.

Two listless brothers fall for the same girl.

Co-pilot Kazuhiro (Tanabe Seiichi) is up for promotion, but before he can get his captain’s wings he has to get through a flight evaluation, and things aren’t exactly going his way. He just crashed and burned on a simulated flight test, and his friendly examiner has been replaced with the tough-as-nails Harada (Tokito Saburo). On the same plane is cabin attendant Etsuko (Ayase Haruka) who’s flying her first international flight and trying hard to not mess up. Elsewhere in the Happy Flight universe, staff are bustling back and forth with various problems and gripes – all to make this ordinary yet fateful flight a safe and happy one.

Suffering from writer’s block and some curious ailments, Reiko (Nakatani Miki) moves to a countryside villa at her editor’s (Nishijima Hidetoshi) beckoning to quietly work on her next novel. Her new environment turns out to be anything but peaceful though when she sights her next door neighbor, professor Minoru Yoshioka (Toyokawa Etsushi), surreptitiously moving a thousand-year-old mummified corpse into his university lab for research. Though Reiko and Yoshioka get off to a bumpy start, the two grow closer over time, enough so that Reiko eventually agrees to hide the mummy in her home. But the mummy isn’t the only unlikely guest in her walls, as a female ghost also lurks disturbingly in the background. At first seemingly a quick trick of the eye, she grows clearer and more distinct by the day.

Koroki is a 35-year old man who admires Japanese singer-songwriter Tamio Okuda and aspires to live like him. He works as an editor at the lifestyle magazine “Mare,” where he meets Akari Amami, a mischievous fashion press writer, and falls in love with her at first sight.

After being neglected by her mother, a little girl is taken in by her uncle and his transgender girlfriend, who create a loving home for her.

High school student Saya Toma (Erika Toda) lost her parents and younger brother in an airplane accident. Detective Akio Kondo (Yu Tokui) came and told her “your family has a high possibility that they were killed by people who have spec.” That was the first time she heard of “spec”. 6 years later, Saya Toma, who has never forgotten what the Detective said, decides to become a detective. She returns to Japan after receiving training by the FBI in the United States. Saya Toma is assigned to work unsolved cases in the Public Security Bureau. Meanwhile, because of Satoshi Chii’s (Yuu Shirota) scheme, Juichi Ninomae (Ryunosuke Kamiki) considers Saya Toma his parents’ enemy and tries to push her to the edge. Satoshi Chii’s scheme has also caused Saya Toma and Juichi Ninomae to forget that they are brother and sister. The siblings are headed to a life-staking fight. A girl named Maho Ueno (Umika Kawashima) becomes involved in their fight. To protect Maho Ueno, Saya Toma uses “spec”.