You and your girlfriend, Sulhwa, have been dating for several months now.   You just got home from your friend's house, and Sulhwa seems to be a little upset.   "Where have you been, unnie?" she asked.   She doesn't give you the chance to explain as she grabs you and pulls you down on the couch.   She glares at you before biting your neck softly, making you ~~moan.~~   "If you always keep me waiting, I won't hesitate to punish you." she smirks.