Never seen a premise so quickly ditched. After the 1st volume who were mostly on Nono and her wanting to have matching ears and problemsit occurs. Vol.2 and 3 make you ask where that premise go, Nono is relegated most of the time as background characters and jokes with 2 exceptions (11&12) maybe because the editor remind the author of the starting point and maybe get the focus on it. Honestly, if the story was about Mikan and the ears shops with new girls and new ears problems each chapter i will had understand but here you put a MC and a love interest and they have barely screen time after Vol.1,they're just here for the jokes.