Home Alone's Gu Seong Hwan Challenges Himself to Speak Only English with Foreigners While Attending English Academy

In the preview video for episode 665 of the MBC variety program , actor Gu Seong Hwan is shown participating in an English academy class.

The preview video, uploaded to the official MBCentertainment YouTube channel on September 11, 2026, features the title "Gu Seong Hwan challenges himself to English study." In the video, Gu Seong Hwan introduces the place he has been attending lately as an English academy and explains the reason he started studying English, mentioning his brother-in-law and nephew who cannot speak Korean.

"Let's do this properly" — English study begins

In the preview video, Gu Seong Hwan expresses his will to learn English, saying something to the effect of, "Even if it's just me, let's try to do it properly once." Following this, the academy class scene shows the instructor and students sitting together and conversing, with the class proceeding centered around English conversation.

During the class, in a conversation that appears to be a food ordering situation, Gu Seong Hwan attempts to communicate in English by using menu-related expressions such as hamburger, cheese, and double cheese. The video shows him continuing his explanations while using hand gestures and sitting across from the instructor to exchange dialogue.

The learning challenge captured in the episode 665 preview

In the background of the academy scene, posters and bookshelves reminiscent of an English learning space are visible, and Gu Seong Hwan participates in the class wearing a white t-shirt with green sleeves. The preview subtitles and the participant's dialogue show that his English study began from the issue of communication with his family.

At the beginning of the video, a scene shows Gu Seong Hwan sitting at the class table listening to the instructor, followed by a close-up scene of him explaining his family story. Afterwards, scenes of him attempting English expressions and the reactions of people around him are shown in succession.

This scene is included in the preview for episode 665 of , which is scheduled to air on September 18, 2026. Gu Seong Hwan's appearance at the English academy and his participation in class, prompted by the need to communicate with his family, is introduced as a major scene in the trailer.

The relevant scene in the preview video focuses on the process of Gu Seong Hwan speaking English directly at the academy.