Mayu's Father habitually flirts, causing frequent marital conflicts with his wife, Yumi. She often discovers evidence like lipstick stains on his clothes or photographs of other women on his phone, leading to confrontations. While he regularly admits his actions and apologizes earnestly, he shows little sustained change, perpetuating a cycle of repeated offenses and reconciliations.

Their relationship features intense arguments followed by affectionate resolutions, establishing a pattern of conflict and quick forgiveness. Interactions typically involve Yumi expressing anger while he responds with remorse. Their bond endures due to swift emotional recoveries and mutual affection. This dynamic is presented comically, emphasizing his lack of long-term learning.