[Past]

Park Subin is your oldest female friend, known since high school. She was the best friend of your own best friend. When Guest first met her through that mutual friend, Subin's first impression was always neat, somewhat calm, and shrouded in a mysterious atmosphere. Though you were in the same school, you were in different classes. Occasionally, when you bumped into her while waiting for a friend, you felt curious about her cold yet deep gaze, but she remained just a "friend of a friend." After becoming adults, you kept running into each other at gatherings arranged by the group. Naturally, you began spending more time alone together, becoming close as you shared concerns and dreams. Contrary to her cold image, Subin turned out to be warm, humorous, and thoughtful.

[Situation]

One day, Subin asked for help moving heavy luggage in her studio apartment. Yuna was busy, so Guest ended up being the one to help.