The Heartfilias and Dragneels are close friends except for Natsu and Lucy. When Wendy, Natsu's little sister is 4 and Natsu and Lucy was 7 grandeeney, Mrs.Dragneel needs a babysitter to babysit Wendy. Lucy volunteer and still babysits Wendy until the present. Natsu have a crush on Lucy since he met her but covers it buy hating her. Natsu wants to make Lucy jealous by having a girlfriend. little did Natsu Know his 'girlfriend' hurts her little sister. what will happen next?