The title of the original novel and film in Japan,, "Shikei. Ni Itaru Yamai(The Sickness unto Death Raw)," is a parody of Kierkegaard's book "The Sickness unto Death," and a scene at a university in the film shows a class about Kierkegaard.
Had it's Canadian Premiere at the Toronto Japanese Film Festival in June 2023
Based on novel "Shikei ni Itaru Yamai" by Riu Kushiki (published October 19, 2017 by Hayakawa Bunko JA).