A really tough math problem

It's the first time that I color a chibi, so I decided to change a little the way I'm used to color manga pages to being able to maintain the cuteness atmosphere of this pic. I know I failed hard, but forgive me my inexperience in coloring cute chibis.

This is a coloring of Magnolia chapter 07. I found no art based on this manga here on deviantArt, and I think it's really a pity because it's a really good manga. Magnolia is published on Aria magazine and is translated to english language by Omari's Sister Scanlator Group. It's a definitely must read for those who are gender bender addicteds (although 'gender bender' isn't exactly the most appropriated word to classify this manga - and if you have read it, you understand what I mean).

Character by Naked ape
Art by Miss B-luv

P.S.: If you have read ch. 07, you certainly understand the pun on the title lol.