Ninzaburo Shiratori and Sumiko Kobayashi

The romantic relationship between Police Inspector Ninzaburo Shiratori and Teitan Elementary School Teacher and Detective Boys "manager", Sumiko Kobayashi.

Relationship Analysis

The love between Ninzaburo Shiratori and Sumiko Kobayashi had actualy began when they were both elementary school aged children. The young Kobayashi was trying to stop two older men from stealing in a bookstore, and the young Shiratori was watching the whole scene take place, and when the goons were about to hurt Kobayashi, he stepped in, rescuing her from any harm. As gratitude, Kobayashi gave him a soda that had paper shaped in the symbol of Tokyo police: Sakura petals. It was then that Shiratori fell in love with her, and decided to join the Tokyo police force because of her influence. However, for a long time, Shiratori believed that fellow officer, Miwako Sato was the same girl he met as a child. However, after solving a case with the Detective Boys, he finally learned that the girl he fell in love with as a boy, was actually schoolteacher, Sumiko Kobayashi.

Their relationship hit a major snag when Kobayashi thought the only reason Detective Shiratori was with her was because of how much she looked like Officer Sato. Thankfully, because of the intervention of the Detective Boys and Shiratori reciting the same words he said to her as a child, Kobayashi finally remembered him. They are currently dating each other, with Kobayashi regularly making bentos for Shiratori.

Shiratori and Kobayashi moments

Volume 66: Files 687-689/Episodes 568-569: Inspector Shiratori, Memories of the Cherry Blossom

• Child!Shiratori comes to the aid of Child!Kobayashi from the two thieves.
• Child!Kobayashi gives Child!Shiratori a cola soda for saving him, wrapping it with sakura petals she made from a straw wrapper. Then, she saids these words that inspire Child!Shiratori to become the police officer he is today:

“	Because the sakura is the symbol of police officers! Determined, kind, and dignified. It's a flower of justice!	„

• After the case, Shiratori has lost all hope in love. However, when Ayumi gives him the exact sakura petals and statement the girl of his dreams made years ago, he desperately asks Ayumi who taught her, and Ayumi replies her teacher, Kobayashi-sensei. When he asks more about Kobayashi-sensei, as if on cue, she appears and Shiratori recognizes her as the "girls of his dreams".
• After Kobayashi comes to pick up the Detective Boys, after being called byInspector Megure and tells the kids she'll take them home by taxi. Shiratori suddenly grabs her hand in the cliché romantic gesture and immediately offers to take her and the kids home in his car. Kobayashi, who is now blushing, shyly accepts.

Movies

Movie 15: Quarter of Silence

• The Detective Boys are shopping for a present for Kobayashi and Haibara suggests a coffee mug that saids, "I LOVE SWANS", the part actually being the picture of a swan.