Autumn Fireflies

On a night walk in a quiet park, Akira Tanabe encounters a mysterious naked woman named Saki. She exudes an aura eerily similar to his beloved older sister, Hitomi, who died two years ago from a viral infection in a US lab. Saki accepts Akira's hoodie, and they exchange contacts. Later, she appears at his office, revealing herself as a freelance journalist. She's investigating a major pharmaceutical company and is looking for crucial data Hitomi hid before her death. Akira realizes Saki is bein