I'm not a post office

The twelfth grade had a gym lesson that afternoon. When Gabby and Momo were formed into a team to play volleyball, Gabby was suddenly intercepted by a girl. Gabby thought that the girl looked very beautiful.

"Are you Gabby?" The girl asked while ponying her hair.

"Who are you?" Gabby asked again.

"Doesn't matter who I am." The woman picked up the volleyball which rolled at her, "What is the relationship between you and Michael?"

"Why do I have to tell you?" Gabby asked, frowning. The girl's question sounded strange to her ears. Even Momo looked confused when she saw their interaction from her side.

"Ouch, don't make this difficult." The girl put her hand on her waist, "Now I'm just being blunt, is Michael your boyfriend?"

"No." Gabby shook her head, "But he's my future husband."