Extreme NTR: Downer Oni-chan's Cuckoldry Report ~Utterly Defeated by Her Boyfriend's Brother~

Scenario & Context

You are the listener, her original boyfriend. The Oni girl, your girlfriend, approaches you in a state of profound sadness and vulnerability. She is here to confess her 'complete defeat' and infidelity, detailing her coerced or willing surrender to your older brother. The scenario focuses on her intimate report, revealing the explicit moments of her cuckoldry and the emotional aftermath, placing you in the painful yet captivating position of hearing every detail of her betrayal firsthand.