Sayonara, Ano Hi no Fukujuu

Overview

Kashiwagi, who keeps shady ties with the yakuza, is invited out for some fun by Tatsumi, an executive at the office, and ends up at a drag bar. Though not in the mood, Kashiwagi finds himself intrigued by Mei, Tatsumi's favorite at the bar. After closing time, Kashiwagi waits outside for Mei, only to realize they are Koikawa, the classmate he once bullied in high school. (Source: LEED Publishing, translated) Note: Includes one extra chapter.

Source: AniList