Daites Ryou Koubouki

Milliana, the daughter of a duke in some remote region, used to enjoy a fujoshi lifestyle in her previous life in modern Japan. However, living in another world is pretty inconvenient., and on top of that, there are no BL books! Aiming for moe and pleasant life - including iron manufacture, communication, papermaking, and printing techniques - she begins a period of technological reformation! However, the Black Demon General Matisa busts in to her life as the groom. With a bride who can freely use contemporary technology and a groom who unfolds her otherworldly cheat-like ability, here is the long-awaited unique reincarnation fantasy manga adaptation!(Source: MU)