Hi Yoshino,
Judging from your height and weight, you must be quite tall,slim
built person?
I also started from your weight and now I am 75 kg.
The supplement that i took back then was :
1) 4 tubs of weight gainer
2)1 tub of creatine
I only began to see results only after 4-5 months and manage to
gain 8 kg.
As I work in a supplement shop company, i can suggest you take a
weight gainer(no need so expensive) and creatine(to boost your
strength so you can carry heavier and thus building new muscles).I
hope this helps.
Cheers,
Fidi Firdaus