The manga from Azure Konno began in 2017 and has three volumes out.
The manga for Nobunaga Sensei no Osanazuma by Azure Konno had been given the green-light for an anime adaptation back in December and with an April 6th, 2019 premiere, the last promotion is starting to filter in.
She mistakes the present-day Nobunaga for the historical Oda Nobunaga, and tries to get him to get her pregnant.