Children's book My butler told me Kadokawa Tsubasa Library

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Children's book
Kadokawa Tsubasa Bunko / live-action movie released in May 2019! Upper class mystery of master and butler combination! The new head of the Karasumaru family, Hanamere, is only 18 years old. Believing that he could spend time with his trusted butler, Otori, he returned to Japan from his study abroad. However, for some reason, Hanamere came from a strange young man named Akizuki. A young family head, a new butler, and an unwilling combination are born!