The time after the start of the school term passed quickly.

"Looks like it's time to put away the autumn clothes," said Teacher Lee Ah-Reum.

"The weather's gotten colder, hasn't it?"

The fallen leaves scattered on the ground were proof enough. It was undeniable—the air had turned crisp and cold.

Walking beside me, Teacher Lee Ah-Reum stifled a yawn and turned to look at me.

"So, why today of all days?"

"Pardon? Oh, well, the [Seiren] project is almost finished, and I finally have some free time," I replied.

"Oh? Does that mean you'll show me [Seiren] when it's done?"