GwakTube earned the nickname "BbungTube." On the November 29th episode of the tvN variety show "Amazing Saturday," GwakTube appeared alongside actor Heo Sung-tae. From the beginning of the broadcast, the two displayed a cheerful chemistry that captured viewers' attention. GwakTube introduced himself as an avid fan of "Nolto" and showed confidence in every game. He said, "I'm worried it might not be fun because I get everything right," which led to the doubtful reactions of the Doremi members.

The appetizer game of the day was "Charades - Famous Lines Edition." As team leader, GwakTube enthusiastically selected his team members, and Heo Sung-tae led his team with outstanding acting skills. In the tense competition between the two teams, Kim Dong-hyun excelled as a pantomime master, and Shin Dong-yup livened up the atmosphere with his witty remarks.

When the main word-guessing problem featured LE SSERAFIM's "Stargeti," GwakTube expressed confidence, saying, "I listen to this song every day. I can write it without listening." However, once the song started, the mismatch between the lip movements and lyrics raised doubts. In the end, GwakTube failed to solve the problem, and Moon Se-yoon commented, "He's BbungTube." GwakTube humorously defended himself, saying, "I only listened to the chorus. It's too fast. Isn't this 0.5x speed?"

GwakTube married a non-celebrity public servant five years younger than him last October. The wedding was moved up from the originally planned May next year due to a premarital pregnancy. It is known that his wife is currently in a stable condition. GwakTube's marriage news became a hot topic among fans.

During the broadcast, GwakTube emphasized how well he knows the program as a devoted listener of "Nolto." However, his remarks aroused suspicion from the Doremi members. They reacted by saying, "Did you only watch the first episode?" expressing doubt about GwakTube's confidence.

In the dessert game "Doppelganger Quiz - Variety Edition," GwakTube showed confidence, saying, "I'm really good at dessert games. I can finish in one second." Heo Sung-tae planned a new challenge to follow the "Heokain Dance," and attention focused on whether he could answer correctly and complete the stage.

Through the broadcast, GwakTube showcased his variety skills along with his changed appearance after marriage. After the show, viewers highly praised his performance and chemistry with Heo Sung-tae. This episode became the occasion for the birth of GwakTube's new nickname, "BbungTube," along with the two's cheerful appearances.