After fainting at work, a young lady awakens in the back room of the café she works at with no memory of her life or those around her. Two of her friends, whom she soon learns are named Shin and Toma, are called to help her get home safely. Once she is alone, she meets a spectral boy named Orion that only she can see and hear. He explains that she lost her memories because of his chance visit to her world, so he vows to help her remember who she is. However, regaining her departed memories without worrying those around her may be more difficult than she realizes. In addition to the gloomy Shin and the protective Toma, she must be wary of arousing the suspicions of the captivating Ikki, the quick-witted Kent, and a mysterious man who lurks in the distance. As her amnesia entangles her in the lives of each of these men, her fragmented memories return piece by piece, and the mysteries of her circumstances slowly come to light.

On a rainy day, Ryou Fujibayashi musters up the courage to confess her feelings to Tomoya Okazaki. Despite not knowing each other for long, the two start dating and develop a harmonious relationship. However, tensions begin to rise when a rumor surrounding Tomoya and Ryou's older sister Kyou spreads around school. Navigating through a web of emotions, Tomoya and the Fujibayashi twins determine where their love truly lies—even if it means standing in the downpour of the heartbreaking truth.

While playing in the snow one day at her shrine, the land god Nanami Momozono witnesses her familiar—the fox youkai Tomoe—collapse, with dark markings appearing on his body. Tomoe's former master, Lord Mikage, appears after his long absence and places Tomoe into a magical pocket mirror in order to stave off his ailment. Mikage explains that long ago, before he and Tomoe had met, the fox youkai was in love with a human woman. Seeking to live as a human with his beloved, he made a deal with a fallen god, but he only ended up cursed and dying. When Mikage discovered Tomoe, the god made the youkai forget his human love as a quick solution. However, something has changed recently to reactivate the curse; Tomoe has fallen in love with his new human master, Nanami. Since there is no way to stop the curse, Nanami wants to stop Tomoe from getting cursed in the first place by traveling back through time, even if it means they may never meet. As Nanami travels back hundreds of years to save her precious familiar, she discovers that she is far more closely bonded to Tomoe than she previously thought.

One morning, Hachiman Hikigaya contemplates the superfluous nature of marriage and its misleading image of happiness. However, he is forced into confronting his skepticism when the Volunteer Service Club is tasked with assisting a local municipal magazine advertise the allure of marriage to younger people. Unfortunately, neither the club's advisor, Shizuka Hiratsuka, nor the other club members have any firsthand experience with the subject. With only one week until the deadline, the group must quickly learn about the intricacies behind the special ceremony, even if they have to resort to more creative means!