Hey Mugen, who's that girl in your pic? she's hella cute!
If you guys are already experiencing thinning, start doing something about it right now! I didn't do anything for 1 year because I thought it might grow back naturally, it didn't. It got worse!
It finally stopped thinning when I took a really long break (no work, no school, nothing) and learned to live healthy (stress management, daily exercise, nutritious food). But by this time, I already lost 50% of my hair lol. I am now using 2 kinds of treatment: Minoxidil 5% and Nizoral shampoo. From reviews online, these two treatments seem to be the most effective and affordable. Do your research on them now. I believe that if I had started using these two treatments last year, I would have a lot more hair than I do now. Good luck!