Shirobuta Kizoku desu ga Zense no Kioku ga Haeta node Hiyoko na Otouto Sodatemasu

The only son of Count Kikunoi from the Kiryuu Empire, Houchou, has no allies or useful skills and is overweight. At age five, he was told his life was over. A new brother named Regulus appears, who is expected to kill Houchou to claim his inheritance. Houchou gains the abilities to cook and sew, along with memories from his past life as a Japanese person. He begins raising his younger brother, making handmade educational toys and cooking meals like chawanmushi. Using his domestic skills, he improves life for those in his territory. He hopes to gradually uplift his people and the country through small, steady efforts.