Keiki's search for someone who truly loves him, not as the object of a perverted fantasy, hits another dead end. However, another unsigned letter grabs his attention, although this time, it's blackmail.
A rotten backdoor deal,
emphasis on "rotten"...
Das war gleich im doppelten Sinn
ein fauler Handel …
Un asqueroso trato deshonesto,
énfasis en ''asqueroso''.
Acordos clandestinos. Entendi.