After experiencing the life of a high school student via the ReLIFE experiment, 27-year-old Arata Kaizaki is amazed at how rapidly it has transformed him. He has started viewing the world from a perspective he had entirely forgotten as an adult. He has made friends and built deep bonds with each of them. Yet, his supporter, Ryou Yoake, reminds him that the experiment is merely an illusion; once it concludes, he will be forgotten by all of them. Another ReLIFE subject's experiment is also nearing its end. After two years with ReLIFE, Chizuru Hishiro has grown into a more open and thoughtful person than she ever imagined possible. She has encountered people who changed her life, her outlook, and ultimately herself. However, now that their ReLIFE is drawing to a close, will they be able to let go of the memories they have created?