-Amazing CHEMISTRY between the leads
-Complex relationships, especially between the male leads, and between them and the wife. Even the side characters are well-developed and nuanced.
-Though often listed as a "BL", this story and the relationships transcend that sort of reductive label. This is kindred spirits of the purest, unbreakable kind
-Actions and decisions always stayed true to the nature of the characters. Emotional without the melodrama.
-Superbly cast
-Gorgeous production, authentic feel
-No unnecessary drama, none of the usual trope-y story-telling. Mature, thoughtful, credible story
-More people ought to watch this, and recommend it to others.