IENE-007 Forbidden Affair With My Best Friend's Girlfriend

My best friend's girlfriend is super cute! What's more, the fact that it's a 'human thing' makes me even more excited. Such a girlfriend invited me so that my best friend would not find out! Before I know it, I'm in a grip as I'm debating whether to make friends or take a chance that won't come again! Such a cute face is too bold! I feel a little nervous and guilty that I might find out, but this situation is dangerous!