
as far as frustration, its gonna get worse before it gets better but ohhhh does it get so satisfying

SPOILER
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so the way the novel describes it, her power of mind control works more like suggestions based on their deep dark feelings. so like with Derrick, she gets into his mind and finds the guilt he has towards taking his little sister out and letting go of her hand, which led to her kidnapping and disappearance. she uses that to plant suggestions like how pitiful yvonne is and how he needs to help her be happy.
With Eclis, she works off his obsessive and yandere-ish desire for Penelope, and plants suggestions like "if you rebel and take your rightful place, Penelope will be yours". And so by the time Penelope runs into him again, he's not really a mindless doll manipulated by Yvonne anymore, he's motivated by those obsessive feelings Yvonne brought out.

so just what it seems to me but imo i think han goyou can feel his sister's talent, from one genius to another, and is feeling intimidated by someone else's potential for the first time. yes shes also probably jealous that he's making songs for his sister's sake, so thats probably part of it, but my theory is that its more about his sister's talent as a singer that's making her anxious
mmmmmh the sexual tension is so strong even though they havent even kissed. actually i feel like them getting so close and not kissing is whats making it so intense and i am here for it