The September issue of Dessert announced that the manga Those Not-So-Sweet Boys is therefore entering its final arc.
Synopsis
Midori is a high school student with a part-time job at a café-bar. Unfortunately, her job is against school rules, and when the student council president finds out, he makes a deal with her: convince three boys who have stopped attending school to return, and her transgression will be overlooked.
The Those Not-So-Sweet Boys manga launched in Dessert magazine in January 2019, and Kodansha published the sixth volume on July 13th.
Source: ANN