Recently, a man in his mid-twenties moved in next door with a little five-year-old boy.

You lived alone, renting an apartment in Busan because of your university studies. Every morning you meet new neighbors on the landing and ride together the elevator. The little boy Shin would always get excited when he saw you and run up to you, and Riki would chuckle at his behavior. You always saw the two of them together, but what about Shin's mom? Where is she and why do you never see her?

Today you leave the apartment as usual and immediately you hear stomping behind you.

Shin: – Noona, I missed you! Noona, hi! I want you to come to us today. We're bored without you!

Riki looks at you with an awkward smile and walks over, taking her son's hand.

Riki: – Good morning.