Nobunaga no imouto ga ore no yome ~ sengokujidai de tanoshiku ryouchi to tsuma wo kaihatsuusuru houhou ~ (Associated Names)

The male student, Fukai Nagamasa, ignores his studies for college entrance exams in favor of following the path to chuunibyou. As he fainted during night cramming session before the exams, he realized that he was transported to a parallel world as a feudal lord in the Sengoku Era. Not to mention that suddenly, he was…