This is a story about my best friend stealing my boyfriend. My best friend Nagi has a boyfriend named Taichi, but she is obsessed with a different man. She was in love with Taichi, but she withdrew because she wanted him to be her best friend, but when she saw Taichi's lonely face, she couldn't help but say, ``Why don't you break up with me and go out with me?'' When I heard that I would be going on a trip with my senior in a month, I gave him a break. If we want to get back together, I'm willing to give up... But Nagi leaves Taichi behind and goes on a trip. That's why I decided to steal Taichi, heart and soul.