Likely the name of the website where the file was hosted or sourced.
It is revealed that Eun-beom’s stance is rooted in a childhood tragedy involving his younger sister's death, for which his mother blames him. Bi-chwi and Si-wook (The Second Couple):
After a period of tension, the two begin to rekindle their affection, leading to a complicated situation where it seems things might finally go well.