I'm not of fan of Jaeyi's behaviour here. He's frustrated with Jinseong and using Ideum's body to release the tension. He's deciding for Ideum who can interact with. This isn't an expression of affection it's confusion and frustration. This isn't genuine concern for Ideum. He isn't even treating Ideum or his body with respect and care. He's leaving Ideum confused. There's no commitment here, Ideum is free to do whatever. Jaeyi is further blurring the lines whe he still doesn't understand his own feelings. Kinda s*y move. I'm not mad at Jaeyi I understand how difficult this is for him. Just wished he could express it a little differently. Ideum doesn't doesn't need to be caught in the middle of this sibling rivalry. Not saying Jaeseong is angel either.