~First Book of The Illness Series~ Natsu Dragneel was in his last year in college about to take over his father's company, Dragon Inc. Everyone thought Natsu was a cold-hearted person, he was harsh to his friends and even random people he just meets. There was a reason Natsu was like this. That's because his childhood best friend and secret girlfriend Lucy Heartfilla were sick with an invisible and deadly illness. Lucy got sick at the age of 9 years old she had met Natsu when she was 5. Her and Natsu always had been close and he was the only one who could calm her before her illness got too bad. What happens when Natsu's stalker finds out about Lucy? What happens with Lucy's illness takes many turns? What happens when Lucy can finally go outside once again? Will Natsu let his friends finally meet and know about his girlfriend?

~Second Book of The Illness Series~ ~Based on a REAL illness, called Myalgic Encephalomyelitis/M.E~ Being sick your whole life can rob you of many things. Erza Scarlet since she was very young has been very ill. She had an illness known as M.E, Myalgic Encephalomyelitis. She's had it since she could remember. Her childhood was robbed from her because of this, she couldn't go to parks with friends, couldn't do anything a normal child would do. M.E was uncurable. Once Erza got to high school she changed her life, she was happier, doing things she loved, now in college she's still trying her hardest to push herself to her limits, doing what she can to do what she loves but behind closed doors she was pushing herself closer and closer to an early death.

~Third Book of the Illness Series ~ ~Based on a real illness called Fibromyalgia~ Harlequin Regis was from a small country called Saltus Mythicon. For the last five years, he had been in Britannia, a large city called Liones. In the last three of those years, he was an exchange student of Holy Circle, a college known for producing prodigies. Before he started his college years, the two years before that he was fighting for his life. Literally. Harlequin had an illness known as fibromyalgia/FM, an invisible illness that threatens and affects the lives of those who have it. Harlequin had been in a wheelchair, comas, and many medical treatments possible. Sadly fibromyalgia was not curable and unless he had a positive drive to keep him fighting...it would sooner or later kill him.