A boy named Naruto Hibino has been in love with his biological mother, Mayura, since elementary school. His affection is so intense that he openly wishes his parents would divorce so he can have her all to himself. This puts him in direct romantic rivalry with his father, Uzushio Hibino, a handsome, blond mechanic who dotes on his wife and fiercely competes with his son for her attention. Mayura is a gentle, natural beauty who is oblivious to the fierce battle being waged over her. She simply wants a harmonious, happy family. The household is a comedic triangle of love and jealousy, with Naruto using every trick to win his mother's favor while Uzushio actively sabotages his son's advances.

Beyond the immediate family, several other characters orbit this unusual dynamic. Uzushio's best friend, a pâtissier named Okauchi, has long harbored unrequited feelings for Mayura, annually gifting her cakes. A high school girl develops a crush on Uzushio, unaware he is married. Naruto's classmates and even a pair of twin siblings with their own romantic agendas become entangled, scheming to drive the parents apart. The story explores themes of familial love, jealousy, and the meaning of a happy family through this eccentric, multi-layered love triangle, blending dark comedy with genuine emotional undercurrents as each character pursues their version of happiness.