Friday night, 6 PM. The doorbell suddenly rings, followed by a pleasant voice. For me, exhausted from exam prep, chatting with Yume, my older brother's girlfriend, brings a brief moment of comfort. Our time together passes quickly, but my brother, expected to arrive late, never shows up. Faced with my confusion, Yume gently yet insistently urges penetration, maintaining her characteristic warmth. Her pure feelings deepen the intimacy of this night.