1 Is Enough, BUT 5!?

Hikaru Nara, a 17-year-old boy, is in more debt than he can handle. Both his mother and father had left him and his little sister, Kina Nara, to fend for themselves. At the age of 13, Hikaru had already started to look for jobs, while trying to maintain enough money for himself and his sister, and trying to maintain his grades, which he gets 100's on, but still. (his sister, by the time he's 17, is 13)

(All rights go to the creator of the quintessential quintuplets, (or Go Toubun No Hanayome) Negi Haruba)

(the name of the first chapter is the state that my brain is currently at)