Mary Lou

Mary Lou Brown is a 15-year-old girl. Her elder sister, Laura, is loved by a lot of boys and they make a fuss in Laura's room every day. One day, Mary Lou meets George in front of her house. He's been looking up at Laura's room. He invites Mary Lou to a party at his house. Mary Lou gets excited. Her mother tells Laura to accompany Mary Lou to the party. Mary Lou is worried that George will be attracted to Laura because Laura is very pretty.

(Source: Manga-Updates)