"Every human is a mixture of light and darkness, fear and trust, love and hate."
-Jean Vanier
Trust. Trust is a rare commodity. Sometimes it is foolish, sometimes it is wise.
I'll tell you the first thing Chuuya and Dazai hate about each other: the fact that they trust each other.
Their blood is mafia black by all right and reason, yet one ran away. They are Double Black; they still are, even if one turned white (or more accurately, grey).
Osamu Dazai and Nakahara Chuuya are shackled to each other with mutual pasts and tangled emotions.