Xuebi’s surname is Wang, and he’s the only son in the family. By “only son” I don’t mean anything special—it’s just that he’s the only boy in this household. Wang Xuebi’s mom runs an antique knick-knack shop, but she’s scary fertile. After popping out Wang Xuebi, she went on to have four girls in a row: Wang Asahi, Wang Sayo, Wang Mahiru, and Wang Yayoi. The four girls have completely different personalities, but they’ve got one thing in common—they inherited their mom’s genes, and each one is prettier than the last. Of course, as the only boy, i.e. the only big brother in the family, Wang Xuebi looks… a little unfortunate. Probably because his mother spoiled him rotten, Wang Xuebi’s waistline has gotten another ring around it lately, and he’s about to need a custom belt. His classmates all call him “fatty,” but Wang Xuebi doesn’t mind at all. He’s the eldest son, the only male—and more importantly, he has four pretty sisters. Even more importantly, all four of those pretty sisters are crazy about him. Wang Xuebi has never interacted with other women. He’s got four knockout girls right at home—why go out and get stuck in traffic? So whenever his female classmates give him a look of disgust, Wang Xuebi fires back a look of contempt. “Fatty, you’re so fat you’re dripping grease, it’s gross.” “I hear he’s a siscon too, always tangled up with his sisters.” “Last time Lin Xian, the guy next door to the fatty’s house, said he saw the fatso taking turns kissing his sisters! I almost threw up just thinking about it.” “Holy shit, for real?!” The chattering girls can’t hold back this explosive rumor any longer, and their shrill voices get even more piercing.