A Heisei youth graffiti drama, in which the heroine Yoneda Yui (Hashimoto Kanna), born in the first year of the Heisei era, connects people's hearts to the future as a nutritionist. Always cherishing her individuality, she sometimes struggles, but powerfully and joyfully pushes through the turbulent Heisei and Reiwa eras.
The suspense story begins when Jin Saeki, a policeman in Yamanashi Prefecture, arrives at a prominent estate residence in response to a tip, and finds the skeletal remains of 13 children, as well as a mysterious marking. Jūzō Haikawa, the long-missing owner of the estate, immediately becomes the prime suspect. Saeki collaborates with a woman named Kanon Hasumi, who has a connection to Haikawa, and together they search for the truth behind the case. In a parallel story set in Tokyo seven years after the case, a girl with a connection to the mark left on the Haikawa estate runs away from home.
Longtime friends and total opposites, Yamato and Kakeru always stick together. When the reserved Yamato admits his feelings, can everything change?
Kuraishi Ena is a high school girl in Minato Ward. She is a gifted girl who was born with the ability to see colors 100 times more than normal people. Therefore, while she was full of talent for drawing from an early age, she was a child who was obsessed with drawing to an abnormal degree, but due to events, she stopped drawing. However, she feels a special color when she first finds her favorite in the perfect boy talent Sonomiya Ren, and she starts drawing. It's also a secret from her classmate's boyfriend Takamori Yuma. Saito Marika, who created Ena's promotion, is happy to have her as a companion, in the meantime, Yuzuki Kotona learns a certain secret.
With their tumultuous relationship wiped from his ex-boyfriend's memory after an accident, Fumiya capitalizes on Okusawa's amnesia to start anew.