Shiro Buta Kizoku Desu Ga Zense No Kioku Ga Haeta Node Hiyoko Na Otōto Sodatemasu Manga -

Using his past-life knowledge, Regulus makes a solemn vow: He’ll lose the “white pig” weight through proper nutrition and exercise, outmaneuver the scheming adults who want him dead, and—most importantly—raise Luciel into a strong, kind, and confident young man. From cooking homemade meals and teaching basic math to confronting abusive tutors and planting secret vegetable gardens, Regulus builds a quiet revolution inside the gilded cage of nobility.

The plot truly kicks into gear with the birth of his younger brother. While the protagonist is a pig, his brother is a human child—and a "hiyoko" (chick/baby). Using his past-life knowledge, Regulus makes a solemn

Here’s a solid, detailed write-up for the manga: Using his past-life knowledge

The manga can be divided into several story arcs: and—most importantly—raise Luciel into a strong