Youkai Sharehouse: The False Prince on a White Horse: Mio Meguro (Fuka Koshiba) continues her dream of becoming a writer, while living with yokai (folklore monsters) in a share house. She struggles in her job in the editorial department of a publishing company. She proposes plans at her company, but her plans are rejected. A popular AI dating app has become popular, but Mio Meguro isn't interested because of her work. One day, Mio Meguro meets genius mathematician AITO (Ayumu Mochizuki), who was raised in England. She falls in love with him, but her love causes problems for the share house and yokai.