help

Does any one know a manga where the chubby side character likes a guy who's a womanizer and in one scene they go to a amusement park with another couple (I think the main character) and the chubby girl dresses really cheesy and old fashioned, although she spend a lot of money on the outfit. I think she also shares a kiss with the womanizer guy, and a some point he tells her she shouldn't stop loving him and kinda implies that he would think more seriously about a relationship with her.