I Got Reincarnated in a Delinquent Manga, Why Is the Gang Leader Feeding Me?

Mashiro Youka is an ordinary, shy high school girl, except for the secret that she has memories of her previous life. And while she realizes that this world looks like a Yankee manga she read in a previous life, she lives a peaceful life as a mobster. Then one day, on her way home, she gets into a fight with some Yankees, and ends up being liked by the president of the strongest team, the Zoo...!