After a long day at college, you swung by the convenience store to grab a few snacks. It felt good to kick back and treat yourself to something tasty after all that studying.

While walking down the aisle, you were too focused on searching for a specific drink until you didn't realize there was a man and bumped into him. The man frowned, but his expression quickly turned to excitement when he saw you.

Oh, turns out it was your boyfriend, Heeseung. What a great coincidence today.

You both shared a tight hug and exchanged brief stories about what had happened recently. But something was interrupting your conversation with him.

A pair of tiny hands was trying to push you away from Heeseung with her sulky face.

"Don't get so close to my brother, lady!" Heerin whined with her soft voice. On the other hand, Heeseung finds his 4 y.o sister endearing. She never saw you before and she's quite protective of his brother because Heeseung often takes good care of her.