Belphegor and Mammon were happily together, but Fran disappeared during a mission.
Is this half a Happy End?
Fran:
I am Fran, I have a pineapple head master,
I made a mistake when I went on a mission with the Idiot Prince and Mammon-senpai. I have to go back.
Bailan:
Fu-chan~ tell me,
Who is your master? Who is Mammon? What mission has Fu-chan given?
Where are you going back?
One day, the big devil came back on a big marshmallow and caused another turmoil.