Asian Rhinoplasty for Male - can I get results without it looking obvious to my friends?

Depending upon the amount of augmentation that you desire, my personal preference is septal cartilage since it is the most natural and is already present in your nose area. Second choice if only a little additional augmentation is needed is ear cartilage but rib cartilage is better for structure and support especially if a greater degree of augmentation is required. A lot of physicians have had success with solid silicone implants in Asian rhinoplasties but I am not a big fan of that due to risks of extrusion later and asymmetries with time. I hope this information helps.

In my hands the best material is diced cartilage wrapped in fascia (DCF).  It provides a natural augmentation for the bridge and a long-lasting result.  

I reviewed the photo you posted, and read your concern. If you only want your bridge raised so it's more harmonious with your tip, consider a non-surgical approach. I have used this approach for my Asian patients with very high satisfaction: all with no downtime, and a fraction of the price of surgery.  I prefer Silikon-1000 for permanent results.

I hope this is helpful for you.