Black Black Lotus

Matsuoka Renna, who recently transferred to Fuyou Girl's Academy, meets up with her elementary school classmate Mayuzumi Kyouko. Known as "Black Rose-sama" and the focus of the pupils' affection, Kyouko claims that she had been concerned about Renna ever since she left town because of a particular occurrence. But Renna is bothered by something. The announcement of Black Rose's death occurs in the middle of all of it. Renna is invited to the "Black Black Lotus" suicide-matching website when she is in shock at this information.