Family Guy (1999)

S5E8 Barely Legal

Meg struggles to secure a date for her junior prom, leading to an unexpected turn when Brian, despite being in a relationship with Jillian, decides to take her. At the prom, Brian drinks to cope with the evening, which results in a spontaneous kiss with Meg. This moment sparks a newfound infatuation in Meg, who starts to envision Brian as her boyfriend and becomes fixated on being with him all the time. Meanwhile, Peter, Cleveland, and Quagmire enlist in the police force to assist Brian in his endeavors.