I Won't Let You Forget Me {Karma x Nagisa}

As adults, both Karma and Nagisa became more in tune with their emotions, and realized that both had feelings for each other. They decided to date and live together, and even had plans set up for their wedding. But, one day when Nagisa is driving to his job as a teacher he is involved in a major car crash. He ends up suffering a head injury that leads him to forget most things about his life. He only remembers that he attended Kunugigaoka Junior High School, his mother, and his name. Karma must try to get him to remember everything else, but will it turn out to be harder than he thought?