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

白豚貴族ですが前世の記憶が生えたので ひよこな弟育てます

Ageha Kikunoi was a spoiled 5-year-old before he suddenly recalled memories from a past life. Then, he loved to cook, sew, and sing above all else. In this world, Ageha and his younger brother, Regulus, try to navigate the Kikunoi house as corruption among the aristocracy deepens. They’ll need skills from Ageha’s past life, blessings of gods and elves, and magic spells to help them on their way! (Source: Crunchyroll)