Shounen Oujo by Utako Yukihiro

Untitled

Shounen Oujo (Boy Princess) is a shoujo manga by Utako Yukihiro, with the original concept by Zenko Musashino. It follows Albert, a poor boy living the Queendom of Morrigan, a country where men have no rights and are ruled over by women. Albert and his friend Theodore are abducted by slave traders, but they are soon bought by a rich girl from a noble family. It turns out that the girl is 11-year-old Princess Alexia Lumiere, heir to the throne of Morrigan, who wants Albert, who bears a striking resemblance to her, to act in her place while she is away for six months. Thus begins Albert's life as Princess Alexia.

Volume 1
Chapter 1 released Dec 31 '11
Chapter 2 released Jan 3 '12
Chapter 3 released Jan 5 '12
Chapter 4 released Jan 6 '12
Chapter 5 released Jan 10 '12
Chapter 6 released Jan 11 '12
Chapter 7 released Jan 13 '12
Volume 2
Chapter 8 released Oct 24 '12
Chapter 9 released Nov 4 '12
Chapter 10 released Nov 15 '12
Chapter 11 released Nov 21 '12
Chapter 12 released Nov 27 '12
Chapter 13 released Dec 3 '12
Chapter 14 released Dec 3 '12
Volume 3
Chapter 15 released Oct 11 '13
Chapter 16 released Oct 15 '13
Chapter 17 released Oct 21 '13
Chapter 18 released Oct 27 '13
Chapter 19 released Oct 31 '13
Volume 4
Chapter 20 released Dec 12 '15
Chapter 21 released Dec 17 '15
Chapter 22 released Dec 21 '15
Chapter 23 released Dec 24 '15
Chapter 24 released Dec 29 '15
Chapter 25 released Dec 29 '15
Volume 5
Chapter 26 released Sep 5 '16
Chapter 27 released Sep 9 '16
Chapter 28 released Sep 9 '16
Chapter 29 released Sep 12 '16
Chapter 30 released Sep 14 '16
Chapter 31 released Sep 17 '16