Jihoon, also known as Brightoon from his YouTube channel Brightoon TV, is a former Big Hit Entertainment trainee who trained with the members of BTS.

On his YouTube channel, he has released several videos talking about his trainee days with the BTS members due to popular demand. In one video, he spoke about some of the restaurants that they frequently went to during their trainee days. In the video, he also spoke about a funny story when Jungkook got upset over some cheese.

If you're an ARMY, you probably know that Jungkook loves cheese alongside other foods like banana milk or instant noodles. However, there was an incident with cheese when he was a trainee under Big Hit that became a lesson forever for Jungkook.

One of Big Hit's trainees who used to have a close relationship with BTS, Jihoon, is now a Youtuber. He is known by the nickname Brightoon from the YouTube channel Brightoon TV. Because he trained at the same time as BTS, he has many interesting experiences living with BTS members.

He is also the one who has repeatedly told about interesting habits or stories related to the life and personality of BTS before they debuted. On his YouTube channel, he once shared the story of eating with BTS.

He talked about the restaurant that the trainees including himself and BTS used to go to when they were trainees at Big Hit. In the video, he also tells a funny story when Jungkook was annoyed by some cheese.

Jihoon shared that when they were trainees, they didn't have much money, so they often went to convenience stores to buy food. One time, Jungkook decided to buy some cheese sticks from the convenience store: "So Jungkook brought a string cheese that was like $1.50 or $1.80".

After buying the cheese, the cashier told Jungkook that if he microwaved the shredded cheese for 10 seconds, it would melt and taste good. Jungkook also used the microwave to roast cheese as the staff said but he decided to keep it longer.

Jungkook asked Jihoon if it was okay to heat the cheese for more than 30 seconds: "Hyung! Hyung! I shouldn’t put this in the microwave for more than 30 seconds, right?". Jihoon then told Jungkook that it probably wouldn't be the best idea to leave the cheese in the microwave for that long as they would all probably melt: "Yes, if you put that in for 30 seconds, it will all melt, so don’t do that."

Even so, Jungkook ended up leaving it on for 30 seconds and after Jihoon walked away a bit, he suddenly heard Jungkook scream: "Noooooo, Oh noooooo!". He turned back to Jungkook and said: "Jungkook! What’s going on! What happened?!". Jungkook was surprised and annoyed when he saw that the cheese he had just bought had melted because he left it there for too long: "Oh no! My cheese all melted down!".

After this incident, Jungkook never put cheese in the microwave for more than 10 seconds. It's also a fun cooking lesson for cheese addict ARMYs like Jungkook!