Amaimon x Mephisto Brother, I'm Bored

Mephisto-- busy with monitoring Rin and his growing pile of paperwork, has no time for Amaimon. Hating that he is being ignored, Amaimon takes things into his own hands to regain his brother's undivided attention.
This is my first fanfiction EVER fully written and published, so I'm sorry if it isn't the greatest.