[Crossover] The Child by Day

Rather than remembering, it would be more accurate to say she could never forget. She was alive, yet it was as if she were not. Like a shadow living in a white night, like a child lost in daylight. Hatake Saya, age 7, height 131 cm, weight 38 kg, Japanese-American, both parents deceased. At the same time, she became unable to forget any memory. Scientific name: hyperthymesia. She thought she would never again feel the meaning of being "alive." Until she analyzed cases with the BAU uncle who adopted her, livestreamed his genius roommate's exploits with a London blogger, solved cases with a partner whose solve rate was 98%, played tennis with a group of energetic boys, fought over basketball with a bunch of chuunibyou, and watched the second male lead show off his romance with his adorable girlfriend alongside a muscle-bound guy... I'm glad I'm alive. Hatake Saya, age 15, height 172 cm, weight 49 kg, Japanese-American. Her birthday wish: May I never forget my memories.