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

The protagonist, Regulus Fenrir Ainsworth , was once the reviled first son of a marquis family—overweight, arrogant, and stupid. After dying from overeating at a banquet, he reincarnates? No, he simply remembers : a previous life as Tanaka Kaito , a hardworking Japanese office worker who loved cooking, budgeting, and caring for his younger siblings.

A deceptively gentle manga about the hardest kind of courage: changing yourself to save someone who has no reason to trust you. Highly recommended for readers who like their isekai low-fantasy, high-emotion, and heavy on the domestic fluff earned through pain. The protagonist, Regulus Fenrir Ainsworth , was once

But as Luciel begins to smile and speak more, their parents grow suspicious. The engagement to a cruel noble girl looms. And someone from Regulus’s original “bad future” timeline seems to have noticed the changes… A deceptively gentle manga about the hardest kind

Page 1: Regulus gasps awake, drool on his pillow, stomach growling. He hears a servant whisper, “The piglet is awake.” Page 5: He wanders the manor at night, following a tiny whimper. Opens a broom closet. Luciel curls inside, knees to chest, dried tear tracks on his face. Final panel: Regulus, eyes wide with horror and memory, whispers: “I did this last time. No. Not again.” He holds out a slightly trembling hand. “Let’s run away together. Just to the kitchen first.” The engagement to a cruel noble girl looms

Fans of Ascendance of a Bookworm , The Savior’s Book Café in Another World , My Next Life as a Villainess , and anyone who loves “found family” + “raising a child” plots with a realistic, heartfelt edge.

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.