MY DEAR DETECTIVE: MITSUKO'S CASE FILES (Kimi wa Nazotoki no Ma Cherie), by Nozomi Ito. First published in 2021 and first published in North America in 2023.
PLOT:
Mitsuko Hoshino wants to become a great detective, but it's hard for her when she has a quick temper, a lack of connections, and the everyday sexism she endures from her clients and the other detectives at her agency. Then she meets Saku Yoshida, a wealthy young boy who moonlights as a waiter, who ends up helping her out with a case involving a missing designer shoe. From that point onward, the two find themselves getting caught up in cases of secret identities, forgery, and missing persons.