Song you want to go along when giving Chocolates
1. Chocolate Disco - Perfume
2. Valentine Kiss - Kokusho Sayuri
3. CHE.R.RY - YUI
4. LOVE LOVE LOVE - DREAMS COME TRUE
5. Daisuki da yo - Otsuka Ai
Songs that enhance/power-up one's feeling of love
1. CHE.R.RY - YUI
2. Kabuto Mushi - aiko
3. LOVE LOVE LOVE - DREAMS COME TRUE
Source -
http://community.livejournal.com/yuistalker/58554.html