The winter for third-year university students is the crossroads in their lives. The season where they are confronted with life choices. It is a season that students cannot disregard. There are those who are about to become adults without making any of their own decisions as well as those who have made up their minds. 21-year-old Matsuoka Aoi (Arimura Kasumi) dislikes making trouble for the people around her. Although she likes the sea, she has given up on her dream of oceanographic research and is about to obey her parents (Sakai Maki, Yajima Kenichi) and get a job with their connections. At that moment, she unexpectedly meets students of Kaiyo University and they have to work together for a time at an aquarium near the sea. The sight of them pursuing their own dreams starts to influence Aoi little by little and their own lives also start to change too. Nagata Taku (Yamazaki Kento), Aoi’s childhood friend who has been wholeheartedly in love with her; Yamauchi Kota (Kubota Masataka), the senior whom Aoi admires; the proud Saeki Yuka (Narumi Riko) who is Kota’s ex-girlfriend; Serizawa Ryo (Asaka Kodai) who has something like love for Yuka; Niwa Reiko (Seino Nana) who cannot break off her affair with a married university old boy, Ichinose Hisashi (Ozawa Kazuhiro); Iino Sosuke (Yamoto Yuma) who has given up on his dream because of his parents’ debts. And then, there is the enigmatic photographer, Kondo Shunji (Higashide Masahiro) who passes by Aoi. While the eight of them spend time together, love and friendship gets entwined.

Haruki Kenji is the manager of the Winter Sports section of a large sporting goods company. On a ski trip in New Zealand with his friend Shintani Goro (who is also his boss) and Shintani's new secretary, Aoi Yuki. Upon returning to Japan he finds that he has a new neighbor in the apartment next to his. It is Aoi. While watching the movers he sees a photograph drop from new girl's luggage. Looking at the photo he sees it is a picture of a group from a female bicycle gang and upon looking closer he sees it is a picture of Aoi. Haruki finds her putting on a façade and fooling everyone at work with her nice girl persona. But at home she is anything but nice, dating lots of men and using them to get what she wants. This continues until one day Aoi comes home drunk and without her keys. Kenji lets her into her room via the door connecting their apartments. Aoi accidentally drops a video tape into Haruki's apartment. When he discovers the tape he watches it. On it Aoi has recorded a message to herself. Seeing this serious message, Haruki begins to view Aoi in a completely different light.

The last escape venture of Princess Mi Kang, the eldest daughter of a royal family in historical Joseon! Tired of being restricted by regulations and surrounded by impenetrable walls in the innermost part of the palace, Mi Kang runs away from the palace and the wedding plans that her parents had in store for her, only to place herself in the thick of a devious plot!

Under the command of the mysterious Charlie, the 3 members living and working in the "Dark Knight" villa help out their clients without getting paid by them. Yanaka, the playwright, gathers information. Imosaka is a magician with beauty. Kishi is an infiltration specialist capable of disguising himself one hundred different ways. Can Kishi and the others solve their client's troubles? What is Kishi's true identity?

Takigawa Go gets the power to transform into Tetsujin Tiger Seven from an artificial heart and a magic pendent. To transform he utters the henshin (transformation) phrase "Tiger Spark".