Gilbert is the son of an affair between Auguste Beau and the wife of his elder step-brother, Anne Marie though he poses as Gilbert&#039;s uncle. He has a great influence on the young boy&#039;s life. He wants Gilbert to suffer so he will develop poetic sensitivity thus leading Gilbert to the state he is in. 

1887, at a remote, elite boarding school in France: Serge Battour returns after his graduation, and remembers the days of his youth... 
1880, at the same school: Son of a viscount and a Roma prostitute (both deceased), Serge is intelligent, sweet, talented, and alienated by his family due to his heritage. Upon being sent to his new school, he rooms with Gilbert Cocteau, a gorgeous loner of a boy who sells his body for reasons unknown. Serge's attempts to reach out to Gilbert fail spectacularly, and yet there is something in both of them that attracts them to each other.

Has acted in a various amount of animated films and television shows, as well as live action.

[Profile (Production Ace)](https://www.production-ace.co.jp/ace_talent/yukosasaki/)

Twin sister of [Marisa Della Pasqua](https://anilist.co/staff/153008/Marisa-Della-Pasqua)

Serge Battour is the son of a French viscount and a Romani prostitute, and despite his kind nature and academic talent, is shunned by his family and his peers due to the color of his skin. He begins to attend Lacombrade Academy, his father's alma mater, in the hopes that there he will find a place to belong. 
Gilbert Cocteau is, like Serge, the orphaned son of a wealthy family, and is infamous at Lacombrade for his beautiful and delicate appearance, lack of dedication to schoolwork, and habit of prostituting himself to other students. He has no intention to connect with any of his classmates, instead devoting himself to his uncle Auguste. 
Due to a shortage of living space, Serge and Gilbert become roommates even though Gilbert's antisocial nature has in the past made it impossible for him to room with anybody. Serge, being sociable and idealistic, is determined to be friends with Gilbert; Gilbert is only interested in either being able to manipulate Serge or push him away entirely. To the surprise of both of the boys, however, the two eventually form a deep, albeit generally dismal, bond that leads to a romantic connection.

The story of Serge's life after the events of the manga series.