On the November 14 installment of 'Hello' on KBS2, BTOB's Peniel made a surprising confession about his hair loss, caused by stress, that has been going on for the last 5 years.

Other BTOB members also made an appearance to support Peniel and discussed difficulties surrounding their idol life. Hyunsik stated, "We have a very busy schedule. To make one appearance on a music show, we get up at 5 a.m. and practice choreography until the next morning, so it is physically very demanding." 

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Minhyuk also shared, "When Peniel was asked when he felt the happiest on a radio show, and he answered that it was when BTOB members compliment him, I was surprised and a little sad. It seemed like he worries a lot about his role in the group and whether or not he feels like he contributes to the team," hinting at why Peniel might have felt stressed out. 

Peniel revealed that he worried, "Other members do individual activities and get their names out there; what should I do?" 

To that, Minhyuk added, "Career as an idol seems very flashy on the outside but it can be very lonely and difficult." Eunkwang agreed by adding, "All these anxieties feel like I am on a tightrope."