Even though they shared the same bus every morning and sat next to each other in class, Ayaka Kagari, the Princess of Tougetsu High School, was nothing more than an unreachable idol for Honoka Takamiya. The horde of students who worshipped the Princess was merely a nuisance to Honoka, living his lazy, regular high school life. Everything seemed perfectly normal until, one day, Honoka is attacked out of the blue by a mysterious witch. To his surprise, Ayaka saves his life, revealing herself to be a fire witch on a covert mission to protect Honoka. From that fateful day, the ordinary life of Honoka is turned upside down as he is thrown into the war between the Workshop Witches, who strive to protect the citizens, and the Tower Witches, who desire to steal a power hidden within him.

Two years ago, Junichi Tachibana had a date on Christmas Eve but was stood up instead. Since then, he has had a hard time showing others his true feelings in fear of being rejected again. However, as luck would have it, Junichi may have a second chance at love when he meets several girls whom he becomes romantically interested in: Haruka Morishima, the energetic and popular upperclassman with a love for cute things; Kaoru Tanamachi, his childhood friend who harbors secret feelings for him; Sae Nakata, the timid transfer student who is shy around men; Ai Nanasaki, a girl on the swim team who has a bad first impression of Junichi; Rihoko Sakurai, a childhood friend with a love for sweets; and Tsukasa Ayatsuji, a seemingly perfect class representative who has a hidden dark side. As Christmas Eve approaches, Junichi can only hope that this will be the year he will finally spend the holidays with the one he truly loves.

In spite of his best time-leaping efforts, Takemichi Hanagaki continuously fails to prevent the present-day death of Hinata Tachibana, his adolescent love. The adult Takemichi grapples with grief and the ramifications of the Tokyo Manji gang's criminal empire—an unintended product of his timeline meddling. Though the gang once operated under the idealistic Manjirou Mikey Sano, it has now been taken over by the malicious Tetta Kisaki and, as a result, has abandoned its original optimistic intent. Despite feeling hopeless, Takemichi travels to the past once again to investigate Black Dragon, a rival motorcycle gang whose actions ultimately lead to Hinata's demise. There, he meets the young Hakkai Shiba, a fellow gang member whose older brother, Taiju, tyrannically rules Black Dragon. When Taiju brutally beats Takemichi in a one-sided street brawl, Hakkai attempts to withdraw from Tokyo Manji in apology—an act that Takemichi must prevent to spare Hakkai a grim future. Through a shared tragedy, Takemichi bonds with Chifuyu Matsuno, establishing a close comradery both boys desperately need. With Chifuyu on his side, Takemichi works to unravel the fates of Black Dragon's members, fighting to create a happy future for his loved ones.

Wang Ling is a high school student with a cool and carefree demeanor. Coming off as someone with a very low spiritual force, he actually possesses a power capable of destroying the world at a moment's notice. To mitigate the volatile force within him, his parents have resorted to using an amulet as a temporary solution. However, the amulet weakens over time and Wang Ling's emotions also accelerate its deterioration. Now with the amulet on the verge of breaking, Wang Ling and his father race against time in order to fix it.