Why Are You Doing This, Duke? manga summary:

“My sweet songbird– my eternal love–
Don’t make such a sad face.
When my little songbird gets sad, it feels like my entire world is raining.”

The Duke, known to many as the grim reaper, “Rowan Peruka”.
He, the very person who was about to chop off my head last month, managed to become my husband?!
He took me in not as a second or third wife, but as the first?!!

I’d love it if this was true love, but this is all thanks to a mysterious magic spell. And the magic spell’s power has been weakening to boot–!

A marriage with a bipolar(?) husband where your own life is at stake,