Thank you for explaining! I thought the ending was utterly heartbreaking, but fitting -- how does anyone come back from all that had happened? But this was one key detail I wasn't sure I fully understood. But now that you've articulated it, it makes sense given how religion was shown to be an important part of Gicheul and Euijung's upbringing. Joonmo had been losing himself bit by bit, and this was his one final sacrifice/terrible thing he had to do. At the same time, couldn't he have just shot him somewhere less deadly? Was he trying to spare him jail?
Do you think their separation/divorce was his choice or her choice? Or mutual?