"Let's go to the beach."

Frida-sunbae suddenly suggested this out of the blue. We had no particular reason to refuse, so we changed our clothes and headed for the subway station. We transferred directly to the airport railroad from Line 2.

Beep—

"Transfer."

Selma-sunbae grumbled as we walked through an endlessly long transfer corridor for five minutes.

"Why is this place so stretched out? Did they mess up the construction or something?" "Well... It's a notoriously long transfer section. Just think of it as part of your diet... Hehe." "Haha, maybe we should have just taken the bus." "..."

However, …