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

In a different world where Western and Chinese cultures are mixed. Ageha is born into this world as the hated son of Count Kikunoi in the Qilin Empire. It seems that in the future, his younger brother Regulus will kill him in a succession fight. Ageha's only weapon is the memory of his previous life. However, he still decides to raise his younger brother because "- My little brother is super cute, isn't he?" He creates educational toys by hand and develops steamed egg custard for his little brother who is like a chick. He mobilizes all his special skills and housework abilities of past life to improve the underdeveloped area!