Can someone kindly explain what's going on in the plot? I'm very confused (￣∇￣")

Momo was a male prostitute then later ran away after he grew too big to continue being a kagema (male prostitute). he then picked by the 'ani' (I can't remember his name) oh.. Manji, his name and they stay together until this day...

Basically, this is a sweet, fluffy story of a flautist (is it?) and a big man with floofy personality and their love story.

Thank you (づ￣ ³￣)づ