Brave Brothers experienced a bit of an uncomfortable moment during his 'study session' with actress Yoo In Na.

On the February 26th broadcast of KBS2's 'Moonlight Prince,' Yoo In Na became Brave Brothers teacher to study the youth poem book 'The Red'. It seems all fine up to this point, so what caused the awkward moment?

The moment came as the two were going through the book when they spotted a poem titled, 'Wet Dreams'.  Yoo In Na, like her carefree self, began to crack up as she even read the word out loud, completely flustering the K-pop hitmaker.

Not so keen on discussing this particular topic on broadcast, Brave Brothers asked, "Can we just skip this poem?" bringing much laughs.

The two agreed that they will read that particular poem on their own time and eventually steered the discussion in a different direction.