Death Castle, the seat of power in the Demon World, is home to three demon kings...and a toddler?! The High Demon King, Death Mask, and his co-rulers Demon King Giant Rock and Demon King Dark Knight find that though they command powerful legions of evil, they aren’t immune to a child’s cries...and so the sweet, innocent human child Maris will grow up under their care! After all, how hard can raising a child be...?
Maris has started taking piano lessons, and he's doing his very best! After all of his practicing, it's finally time for him to perform in a recital. All of the demons who've gotten to know Maris well, starting with Death Mask, watch over him as he gives his performance, but...the Demon Kings' overflowing love comes out in the form of tear-filled smiles. The final volume of the heartwarming Demon World gag manga is here!