From the publisher:

Six years after Polina , Bastien Vivès returns to the solo graphic novel, a complete and accomplished author. A master of suggestion, he sketches the stumbling awakening of adolescent desire, tinged with an unexpected gravity, this delicate and sensual narrative. With A Sister, Bastien Vivès goes from the status of young prodigy to that of a major auteur.

Antoine, 13 years old, is on holiday at the seaside with his parents and his younger brother, Titi. Both spend most of their time drawing, at restaurants and on the beach. One night, Antoine discovers an extra person lying in their bedroom. Hélène is 16 years old, she and her mother came to spend a few days and her presence and behavior provoke an ambiguous disorder in Antoine.

A sister comes to testify that Bastien Vivès is not just a young designer with disconcerting facilities but an auteur in the strongest sense of the term. It opens the way to a whole generation of artists who succeed to that of the 90s and renews the genre. At 32, he is at the forefront of innovation in comics.