Shiraishi

Shiraishi (白石 Shiraishi) is Natsuki Mogi's classmate who revealed to Takumi Fujiwara that Natsuki was engaged in an Enjo-Kosai affair to an old man in a Mercedes-Benz. It is later revealed that the man is her father. She informed Takumi on the phone as she cried. She is a Manga-only character, and has never appeared in the anime, she does however make an appearance in the Legends trilogy.

She wears glasses and has black hair tied in pigtails. She has a crush on Takumi, and gives him chocolate on the last Valentine's day before they graduate.