Shigoto ga Tanoshii

Machi works in a brothel to pay off his father's debt, resenting his circumstances and taking out his frustration on those around him. Despite this, Masakazu, a co-worker, treats him with kindness and looks after him. As Machi gradually opens his heart to Masakazu, he finds himself developing feelings for him. However, he soon realizes that he is entangled in Masakazu's distorted view of love...

(Source: Fusion Product, translated)

Note: Includes one extra chapter.