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[Comprehensive] Yoon Si-yoon 'Taxi Driver 3' Filming with 24-Hour Water Deprivation + Sauna Challenge... Lost 5kg in One Day ('My Little Old Boy')

Kim Minju
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2025-06-22 23:16:15
'My Little Old Boy' Photo | SBS
'My Little Old Boy' Photo | SBS

Yoon Si-yoon underwent 24 hours of water deprivation for drama filming.

On the afternoon of the 22nd, SBS's entertainment program 'My Little Old Boy' (hereinafter 'My Little Old Boy') featured Kim Jun-ho, Choi Jin-hyuk, Yoon Hyun-min, and Yoon Si-yoon.

In this episode, the first guests were Kim Jun-ho, Choi Jin-hyuk, and Yoon Hyun-min. Kim Jun-ho said, "I'm going on my honeymoon soon. I'm thinking of a domestic destination. Usually, people go to Jeju Island, right? But I'm considering Ulleungdo. Ulleungdo is an island you can only go to if the sky permits. Because of the weather," explaining why he met the two.

Jun-ho added, "You guys have met a lot of women. I'm asking you to see if it's okay as a honeymoon destination from a woman's perspective. First of all, Ji-min likes to enjoy things. So I prepared it as the ultimate luxury."

The three boarded a large cruise ship and explored the VIP cabin prepared by Jun-ho. Choi Jin-hyuk and Yoon Hyun-min, seeing the room that had everything including a movie theater, exclaimed, "This is amazing! You can see the view too," admiring Jun-ho's choice.

They filled their stomachs with various foods at the cafeteria on board, which Jun-ho had prepared as the second course.

Upon arriving at Ulleungdo, the three enjoyed a drive in a yellow sports car that Kim Jun-ho had prepared in advance. However, Jun-ho ominously hinted at an uncertain future, saying, "From here, we have to walk," as they faced a narrow and steep uphill path.

While walking deep into the mountains, Yoon Hyun-min warned, "Sister-in-law Ji-min will say, 'Oppa, how long do we have to walk?' This is grounds for divorce, hyung! It would be a disaster to come on a honeymoon like this." Kim Jun-ho panted, "That's why we're scouting it out."

At that moment, a man whom Kim Jun-ho referred to as "Brother Black Goat" appeared. It turned out that the honeymoon destination was a black goat farm. The three adapted to the environment by feeding the black goats directly.

Seeing two baby black goats that were only 8 hours old, Yoon Hyun-min was bombarded by their cuteness. When Kim Jun-ho lamented, "They gave birth faster than I did," Choi Jin-hyuk and Yoon Hyun-min hinted, "Isn't that a good sign? They're twins." The black goat uncle also expressed his delight, saying, "It's a good omen that they gave birth on the day Jun-ho came."

Later, the three enjoyed a meal of Dokdo shrimp, steamed squid from Ulleungdo, and squid ink ramen while chatting. When asked about his last kiss, Kim Jun-ho shyly replied, "I have had one more than I thought! Tsk."

Kim Jun-ho added, "I'm getting married soon! It hasn't been a month! It was two weeks ago... Ji-min got so drunk and kissed me," to which Choi Jin-hyuk teased, "So you can't not drink."

After finishing their meal, they headed to the luxurious accommodation, the final honeymoon course prepared by Kim Jun-ho. After seeing the luxurious bedroom, living room, and dining room, Choi Jin-hyuk expressed satisfaction with Kim Jun-ho's honeymoon destination, saying, "At first, it was a triangle, but now it's a circle."

'My Little Old Boy' Photo | SBS
'My Little Old Boy' Photo | SBS

The second guest on 'My Little Old Boy' was Yoon Si-yoon. Having shown a life of control for 24 hours in the previous broadcast, Yoon Si-yoon revealed his planned daily routine without any difference. Returning with the drama 'Taxi Driver 3', he embarked on a 24-hour water deprivation to give a haggard impression.

Having been deprived of water for 15 hours since the previous night, he said, "I just have to hold on for 9 more hours. I'm so thirsty. I should have drunk a little more yesterday," struggling. At that moment, an alarm for breakfast rang, and he asked AI to decide on a waterless diet menu.

Yoon Si-yoon prepared breakfast with waterless ingredients like chicken breast and shrimp, making tofu dumplings and asparagus. He exclaimed, "Oh, it's so dry! Don't weaken. Everyone lives like this," as he closed his eyes and ate.

Arriving at the gym according to the next alarm, he engaged in high-intensity training that was twice as hard as usual to shed water weight.

Back home, he headed to the bathroom with a heater for complete dehydration. He added salt to a bathtub filled with water heated to 45 degrees and endured an extreme sauna purely with mental strength. After successfully completing a 20-minute sauna, he revealed his weight of 62.3kg, showing a loss of about 5kg in one day.

Dragging his weary body to the studio, Yoon Si-yoon was rewarded for his dehydration process with a poster shoot.

It airs on Sundays at 9:05 PM on SBS.

[Seo Ye-ji, Guest Reporter for Star Today]

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