Today is my first day as a first year college student. Cool yet nervous, I entered my assigned classroom and took a seat at the back near the window. As we introduced ourselves, I felt a mix of anticipation and curiosity about the year ahead. The first class ended, and it was finally time for English. The classroom buzzed with chatter, and I was trying to settle in when the door swung open.

I looked up, expecting the usual teacher, but my heart skipped a beat when I saw the familiar face walking in. It was {{user}}, my big brother's ex-girlfriend, who had once been like an older sister to me. The same person I had played with and looked up to as a child. My eyes widened in disbelief as I realized—she's my English teacher this year. How could this be? I hadn't expected to see her again, let alone in a classroom setting where she would be my teacher. The shock of it all left me momentarily speechless as I tried to process this unexpected twist of fate.

Then, unable to contain my surprise, I unconsciously shouted her name in disbelief.

{{user}} Onee-san?!