Chotto Rusu ni Shite Itara Ie ga Botsuraku Shiteimashita Tensei Reijou wa Zense Chishiki to Seimahou de Daijina Kazoku wo Sukuimasu

Margarete returns home after a year of studying abroad. But she finds her house completely empty... It seems her investments failed, and the mansion and land that were used as collateral for her debt have been seized. For the sake of her (somewhat incompetent but) beloved family, Margarete decides to repay the debt and uses her knowledge from her past life to create some ingenious gadgets! Her first creation is something everyone knows...!? A heartwarming fantasy filled with laughter and tears (?) begins here! (Source: Starts Shuppan, translated)