release dates of anime Tantei wa Mou, Shindeiru.

When an ordinary high school student named Kimihiko Kimizuka finds himself seated next to a beautiful detective on a hijacked airplane, his life takes an extraordinary turn. The detective, who calls herself Siesta, recruits him as her assistant, and together they embark on thrilling adventures around the world for three years, solving supernatural mysteries and battling secret organizations. However, their partnership comes to an abrupt end when Siesta passes away. One year after her death, Kimihiko attempts to return to his normal life, but the past refuses to stay buried. He encounters a girl named Nagisa who possesses Siesta's heart after a transplant, pulling him back into a world of intrigue and danger. As new mysteries emerge that connect to his former partner, Kimihiko must confront unresolved cases and face threats that continue to surface, all while grappling with the loss of the detective who changed his life forever.