Yoshino Takigawa, an ordinary teenager, is secretly dating his best friend Mahiro Fuwa's younger sister, Aika. But when Aika mysteriously dies, Mahiro disappears, vowing to find the one responsible and make them pay for murdering his beloved sister. Yoshino continues his life as usual and has not heard from Mahiro in a month—until he is confronted by a strange girl who holds him at gunpoint, and his best friend arrives in the nick of time to save him. Yoshino learns that Mahiro has enlisted the help of a witch named Hakaze Kusaribe to find Aika's killer. However, the witch has been banished to a deserted island due to infighting within her clan. Hakaze's brother, Samon, selfishly desires to make use of the Tree of Exodus' power, in spite of both his sister's opposition and the impending peril to the world. With Hakaze out of the picture, it is now up to Yoshino and Mahiro to help her save the world, all while inching ever closer to the truth behind Aika's death.

Following the faceless god Hitogami's advice seems to have worked wonders for Rudeus Greyrat. After enrolling into the University of Magic as he was told, Rudeus reunites with his childhood friend Sylphiette, who put a valiant effort into curing his condition. The two grow ever closer together and decide to host a wedding party, inviting the friends they have made over the years to announce and formalize their relationship. For all his recent blessings, however, Rudeus' troubles are far from over. The research he is helping Shizuka Nanahoshi conduct hits a bottleneck, sending her into a deep slump much like he experienced in his previous life. Furthermore, a letter from his father, Paul, brings complications to Rudeus' relationships, and Sylphiette still knows next to nothing about his real background. In the face of these issues, Rudeus will have to apply the lessons he has learned in this new world to navigate through the challenges that come with living a life to its fullest.

The world has become a slaughtering ground for the Crimson Denizens, mysterious beings from a parallel universe who thrive on the life energy of humans. These merciless murderers only leave behind scant remainders of souls called Torches, which are mere residues that will eventually be destroyed, along with the very fact of the victims' existence from the minds of the living. In an ambitious endeavor to put an end to this invisible, hungry massacre, warriors called Flame Hazes relentlessly fight these monsters. One fateful day, Yuuji Sakai ceases to be a regular high schooler—he becomes trapped in a crevice of time and is suddenly attacked by a Denizen. Coming to his rescue just in the nick of time is a nameless hunter who seems no different from an ordinary young girl except for her blazing eyes and burning crimson hair. However, before Yuuji can learn anything more about his situation, he discovers that he has already been reduced to a Torch—merely a scrap of memory waiting to be extinguished.

With a new school year comes a new crowd of classmates, and for their final year of junior high, aspiring writer Kotarou Azumi and track team member Akane Mizuno end up in the same class. Though initially complete strangers, a few chance encounters stir an innocent desire within their hearts. A yearning gaze, a fluttering heart—the hallmarks of young love slip into their lives as fate brings their paths to a cross. However, though love is patient and love is kind, Kotarou and Akane discover it is not always straightforward. Despite the comfort they find in each other's company, heartache and anxiety come hand in hand with pursuing the feelings in their hearts. With the uncertainty of how the other truly feels as well as the competing affections of those around them, the road ahead is unclear. Even so, under the shining light of a beautiful full moon, Kotarou gathers his courage to ask Akane a single question, one that forever changes their quiet relationship.