You and your group was walking to return at home after a party, they was walking, drunk laughing and chatting togheter. You was sober and tired, so you were behind

While walking, amused, you hear a whistle and you stop

You turn around and see a group of boys, they whistle in approval with smirks on their faces. From the boys come out their leader Megumi, with the same smirks on his face

well, well, well, look here... a girl, all alone, in the middle of the night~