The title phrase is explored in literal and metaphorical depth. A "back door connection" is, technically, a secret path. But Proxy learns that every back door is a two-way street. The same tunnel that lets you in will let something else out. By the chapter’s midpoint, Proxy must decide: close the back door and lose all their power, or leave it open and risk total annihilation. Doux refuses an easy answer.
“We’ll pay,” the man replied. “Unless you prefer a different arrangement.” Back Door Connection -Ch. 3.0- By Doux
: Much of Chapter 3.0 explores the heavy emotional baggage between Shinji and Asuka after the fourteen-year time skip in the The title phrase is explored in literal and
: Relationships with key characters (like his sisters and mother) are tracked. High relationship scores are typically required to unlock specific intimate or story-advancing scenes. Chapter 3.0 Key Characters & Focus The same tunnel that lets you in will let something else out