It's Complicated

Lisanna is wedging herself in between Lucy and Natsu. Lucy gets kicked off the team and is replaced with Lisanna. What will happen? How will this affect the guild? Why is Natsu so ridiculously dense? And most of all, how will it affect Lucy? (Sorry I'm bad at summaries but the story is good) NaLu just got a lot more complicated. No swearing or anything like that but T just in case.