"The world average age for the first sexual experience... 17.3". Is that early? Late? Seno Sakura has a serious personality. Hara Tsumugi has never liked a member of the opposite sex before. Minagawa Yuna is experienced and is currently dating a company employee. At the age of 17, the girl's "sexual values" begin to fluctuate.

Toji, a manager of a food section in a medium-sized department store, has to put up with a tough boss that makes every day a real struggle. But things start to look up for him though when he meets a pretty elevator girl named Nao. Just as he is starting to enjoy a new-found happiness at work, a new account manager from an advertising agency visits Toji’s division, and it is none other than Toji’s ex-girlfriend from university, Makoto. Toji is surprised to see her again but Makoto treats him as if she has never met him before. Now dealing with a tough job and caught in the middle of a jealous Nao and Makoto who dumped him, things couldn’t get much worse for Toji!

University student Sogawa Ichika inherits 5 trillion yen from her father all of a sudden and attempts are made on her life by his siblings. The avaricious family has struck a deal to let the person who kills Ichika first have all the money to himself or herself and tries all means to take her life. Ichika’s housekeeper hires the investigator Chikumagawa Hikaru, who has a perfect record of solving cases before they happen, to protect her.

The story is set in a big hospital which is infiltrated and taken over by an armed group wearing devil masks. Musashi Saburo a police officer on leave of absence has to save the hostages within a set time limit.

The mystery of how Kazama Kimichika became so ruthless and unmatched will be revealed. Kyojo Zero depicts the time before he was assigned to the police academy, when he was working as an instructor in charge of training new detectives...

Hina, a student at Nikko High School, goes out one evening with her classmate Beniko. They get split up and Hina ends up in a strange meeting with a man named Ikumi in a game arcade. The next day, Ikumi turns up as the new teacher at her school. Ikumi doesn't seem to recognize Hina but the wheels of fate are slowly moving to reunite them in what is a passionate story of forbidden love.

One year after the hospital occupation incident, Saburo Musashi (Sho Sakurai) of the Kanagawa Prefectural Police Investigation Division has another "worst day" ...! Kanagawa Prefecture's first international airport "Kanagawa New Airport" is suddenly occupied by an armed group wearing a beast mask!