A former JYP trainer JayB (Song Jae Yeop) reacted to ITZY’s new music video “Not Shy” and revealed a story about Ryujin during his time at JYP Entertainment.

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| @ITZYofficial/Twitter

This story begins when he first started working at JYP as a trainer.

I fought when i was work at JYP Ent. beacause of Ryujin's OOOO! (MV Reaction) 10-29 screenshot

He was ITZY’s trainer right up until the groups’ debut, so he knew the members quite well.

I fought when i was work at JYP Ent. beacause of Ryujin's OOOO! (MV Reaction) 10-33 screenshot

Although he had many stories to tell, he decided to tell one story regarding member Ryujin.

I fought when i was work at JYP Ent. beacause of Ryujin's OOOO! (MV Reaction) 10-44 screenshot

He was in charge of creating the choreography and concept for Ryujin’s performance on JTBC‘s Mixnine.

I fought when i was work at JYP Ent. beacause of Ryujin's OOOO! (MV Reaction) 10-59 screenshot

But he ended up fighting with the company over this performance!

I fought when i was work at JYP Ent. beacause of Ryujin's OOOO! (MV Reaction) 11-9 screenshot

I fought when i was work at JYP Ent. beacause of Ryujin's OOOO! (MV Reaction) 11-12 screenshot

JYP wanted to go with a common track that was popular at the time…

I fought when i was work at JYP Ent. beacause of Ryujin's OOOO! (MV Reaction) 11-23 screenshot

…but JayB thought that it was too common and boring to be used for the performance.

I fought when i was work at JYP Ent. beacause of Ryujin's OOOO! (MV Reaction) 11-30 screenshot

He kept pushing to use a different style track and chose Taylor Swift‘s “Look What You Made Me Do.”

I fought when i was work at JYP Ent. beacause of Ryujin's OOOO! (MV Reaction) 11-40 screenshot

I fought when i was work at JYP Ent. beacause of Ryujin's OOOO! (MV Reaction) 11-54 screenshot

He did not back down and kept pushing this track until the company agreed to his choice.

I fought when i was work at JYP Ent. beacause of Ryujin's OOOO! (MV Reaction) 12-3 screenshot

He felt strongly that this different style of song would help appeal more to Ryujin and show off her abilities well.

I fought when i was work at JYP Ent. beacause of Ryujin's OOOO! (MV Reaction) 12-46 screenshot

As a result, she made a stellar performance that was praised by many! What do you think of her performance? Do you think it was worth the trainer to fight JYP to choose this song?

JayB also admitted that although he did push it a bit strongly to the company, it was the best choice for Ryujin and also helped him gain credit as a new trainer at the company.

I fought when i was work at JYP Ent. beacause of Ryujin's OOOO! (MV Reaction) 13-0 screenshot

Watch the video below to see his full reaction to ITZY’s new music video!