Neo Geogido Choksuya?

Buyeoju and Kangnamju are childhood friends and current rival hunters. One day, the two fall into a mysterious gate together.

[Quest occurrence: 'Childhood friend' and 'First experience' or death!]

The two can't help but be shocked as they check each other's faces in the status window. As top-level hunters, they know best that they can never escape the gate until they complete the mission. While they are hesitating, their abilities are stolen, and in the end, the two decide to start the mission... Unable to tolerate their immaturity, the C-class monster 'Tentacle' attacks them.

(Source: Ridibooks, translated)

Note: Part of RIDI's Sengmotjung Danpyeonseon (섹못죽 단편선) Collection.