Melody & Christopher were kids detective.
But they were not common detectives, because Melody could talk to animals.
And they used to face weird cases.

Like Denis Spencer's case, a famous detective who was left a note by Latysia, his girlfriend:
"To my detective... please look for me. The deadline is two weeks. The key is glass star. If you are the same as you were before, you will remember... if you can find me, I will trust you...
p.s. the reward is... my love for 50 years"

Melody & Christopher is a manga for kids. It's cute and contains surprises.
In vol. 2 the stories were mostly related with their ability talking with spirits.
The author described them not in horror style, but as human being,
with tears and happiness. Love meant "forever".