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This highschool girl Tsuchinoko just figured out this one "weird" trick to keep her crush from getting closer with his ex. Childhood Friends hate her!
Yup she's definitely acting like that, like a bit. She's really selfish and I kinda despise that, hope she changes. But those traits of her, her selfishness, and lack of empathy likely comes from her "relationship experience" that is definitely sht and "no love experience" as well as being a dumb teenager still learning about boundaries, social cues, etc.