Kiite, Ore no Hazukashii Oto

Terasaki, the top earner in the sales department, is adored for his good looks and friendly personality. One day, he runs into Andou, a colleague who is the complete opposite of Terasaki and is not well-liked in the company, when he rushes to the restroom..? (Source: Takeshobo, translated) Note: Includes one extra chapter.