My girlfriend Kokoro is cute, has big breasts, and an amazing figure. She gets along well with my friends and we all hang out together. Kokoro is close to people and isn't very Kokoro, so even though she has big breasts, she often goes braless or wears clothes that show off her cleavage, so my friends seem to have been secretly peeking at her breasts, and when I'm away on a business trip, they invite her out...