The best x detective in the world (double heroines)
"We're going to die anyway, so let's get some company."
Both of them were suffering from a dying disease, but they healed each other and went from being suspicious of each other to loving each other.
Heal each other and mend broken hearts
"Since the world is dark, I will hold my sword and walk with you."
Plant flowers in that dark place...
"The distant dream returns to invade the dawn, and the letter from home arrives the next year."
In fact, that summer, I was attracted to you.
I fell in love at first sight...
Purpose: Seeking justice for the world