I'm currently in love with this song from The Gazette.
The Gazette - "The Pedge" (Japanese)
Please listen and enjoy. It's so beautiful.
Anyway~ Let me introduce you to some more of my favorite songs. They are not in order, but hopefully you will enjoy them. I mostly like songs that will give you emotions while listening to them, mostly accompanied by piano melodies as well. ^^
Baek Ji Young - "Like being hit by a bullet" (Korean)
The Trax - "Over The Rainbow (Piano version) (Korean)
LoveHolic - "Shinkirou" (Korean)
Olivia Lufkin - "A Little Pain" (Japanese)
Scary kids Scaring Kids - "Watch Me Bleed" (English)
Saosin - "You're not alone" (English)
Supechic[k] - "Stand In the Rain" (English)
X-Japan - "Endless Rain" (Japanese)
Yamashita Tomohisa - "Loveless" (Japanese)
Ft. Island - "Saranghajimayo" (Korean)
Nicholas Teo - "Dusk" (Chinese)
Rainie Yang - "Ai Mei" (Chinese)
Yoshiki & Dahlia - "I'll Be Your Love" (Japanese)
Sugizo & Vivian Hsu - "Tata" (Chinese)
That's it for now. Hope You Enjoy!!