A.

Following a devastating accident at school, Mitsu awakens with no recollection of her past. Forced to rebuild her identity from scratch, she struggles to piece together the person she used to be. During this difficult journey of self-discovery, she stumbles upon a cryptic note written in her own handwriting, dated just one day before the incident. The brief message contains only a single confession: "I like 'A.'" This simple phrase plunges Mitsu into deep confusion and suspicion. Her current boyfriend is Hongou Hideto, a name that holds no connection to the letter "A" whatsoever. As she grapples with her fragmented memories, unsettling questions begin to surface. Who exactly is this mysterious "A," and what role did they play in her life before the accident? More importantly, does Hideto know the truth behind the scribbled confession? Mitsu is left to wonder if the person closest to her is concealing vital information about her forgotten past, turning her quest for recovery into a tense search for answers she may not be prepared to face.