Hananie to Oni no Ou

I wish to dedicate this life to Lord Genryu, the King of Demons. Momo, the youngest child of the tea house family, has been yearning for the demon that protect the country. One day, he was invited to the centennial celebration of Genryu's inauguration as head of the family. He became his personal tea master. The demon who protects the country from monsters appear once every hundred years. He survives by eating humans. He served Genryu and caught his eye. It was Momo's dream to have him eat him. However, Genryu had been eating humans for 200 years. It seems like he's refusing..!? Having fallen ill and collapsed, Genryu mistook Momo for someone else. "The fact that I was able to meet you means that I can finally die," he whispered in his delirium..!?