Shirohiyo - Reincarnated as a Neglected Noble: Raising My Baby Brother With Memories From My Past Life

Ageha Kikunoi, the youngest son of the Kiryuu Empire's Count Kikunoi, was given up for dead at five years old. However, due to the Count's recent discovery of Ageha, he's now expected to take part in the imperial succession. Unbeknownst to the Count, Ageha was actually reincarnated and retains memories from his past life, granting him the skills of cooking and sewing. Ageha decides to focus on raising his younger brother Regulus, whom he believes is destined to kill him in the future, rather than pursuing his own claim to the throne.