Mari wa Happy End de Onegaishimasu  

Happy Wedding for Mari, マリはハッピーエンドでお願いします

Mari is an ambitious 18-year-old schoolgirl who dreams of becoming a housewife. She's quite sassy and mischievous, always trying to find the perfect husband to help her achieve this goal. One day, Aoi, a popular musician, surprises Mari with an unexpected proposal: "Let me marry you, and in return, you will become my vocalist." Despite their differences, they embark on a love story that is both entertaining and heartwarming.