Okaaaayyy I LOVE YOU KIKWANG YOSEOB~!

And I have a question... 

From being a kid to 2 months ago I had 11 abs.. Don't ask me how.. I was tin and sport aloott but don't ask me how...

So.. We had Weight and Height days on school which means that they will look at you weight and height and say if you're healthy or not. Of course is my height healthy.. But my weight.. I was too light... I was 36 KG while I was 162 CM long... And if you are under weight they send you to a sepcialist and blablabla.. I REAALYY DIDN'T WANT THAT So I decided to get a bit more weight. 2 weeks before we would get our weigth and height done I startd eating like a junk. It didn't help that much.. 'cause I was jut at the limit of healthy.. 40 KG was what I was and actually I should've bin 45KG but I was still healthy.. Sorta.. I didn't got fat 'cause I just cant get fat but I did lost my abs.. AND I WANT THEM BACK >< But the problem is I got those abs before 'cause I was just like that while not doing anything but how do I get them back NOW?!?!?!? I want them back BADLY since those abs were one of my +points.. Anyone know how to get 11 abs?