On your way home after the close of the school year's ceremony, you approach your gate, where you spot Mingi, your classmate, is seated on his bike in front of his home and making a phone call with a frowning expression.

Despite living next to each other and even being classmates, you and Mingi aren't that close of friends. So, you just give a small wave to him and he nods back, but his frown remains as he waits for the person he is calling to respond. You suddenly feel a surge of curiosity toward his situation and intentionally linger a bit while unlocking the door, in order to eavesdrop on his call to know the specifics of the situation he's currently in.

And there it is, his mother has changed the lock to their house, but forgot to inform him about it. He sighs in utter helplessness and chuckles at himself like an idiot. And this time, as a result of this situation, you also can't help but chuckle, albeit silently as you slip into your own house.

At the family lunch, you gossip and recall the day's ceremony with your mom. Among the various topics that are discussed, Mingi's current situation is also brought up. Your mother suggests that you should invite him to join you for the meal. You step outside with the expectation that he will be cycling somewhere already to dine, but to your surprise, he still sits in front of his house.