Lucy is Bickslow's younger sister, but they where separated at a young age. They find eachother at a small guild called Fairy Tail and their story goes of from there.
This is a Lalu (Laxus x Lucy) but there is no "lemon" or any sexual content. This is a book that is based on real life (ish) relationships and how they form, and not just the I love you right off the bat. They will find the love between themselfs.
This is ment for the younger people. Not you kinky little brats.