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For the next episode of 'Amazing Saturday', fromis_9's Lee Na Kyung joined in as a guest member. During the recording, Heechul talked about his special relationship with fromis_9 as their former teacher on 'Idol School'. In the midst of it all, however, MC Boom suddenly brought up the subject of TWICE, suggesting that Heechul's all-time favorite girl group would still be TWICE.

As usual, Boom pointed out that Heechul must do one of his 'Ideal World Cups', giving Heechul two options: TWICE and fromis_9. "Which event would you attend if both groups were having a concert on the same day, at the same time?" 

To tease Heechul, other members of the cast added conditions such as, "What if Momo told you, 'Oppa, please join us for an afterparty as well!'" and "What if all of the fromis_9 bowed down to you and thanked you as their best teacher?" The dilemma made Heechul cringe, as he wanted to remain faithful to his 'multi-fandom' status.

In the end, Heechul burst out saying, "I love you, fromis_9, my students! You guys will surely succeed!" then immediately put his hands over Lee Na Kyung's ears before he chose "The picture on the right (TWICE)".

Prior to this anticipation, Heechul did remark that out of three concerts that he attended in a span of five years, two of them were TWICE's concerts. He also supported his argument by telling Lee Na Kyung, "A teacher must have his own hobbies, too." Nevertheless, the fromis_9 member replied, "All that's left are wounds (for me)."

What would you do if you had to choose between two of your ultimate biases? For more of 'Amazing Saturday', make sure to tune into this episode on June 23 at 7:40 PM KST through tvN!