The rooftop of the old school building belonged to the Astronomy Club.
It was said that their club activities even included secretly staying overnight at the school, standing on the rooftop of the old building at night, and observing the stars with a telescope.
If it were late at night, even in the brightly lit metropolis of Tokyo, one could still see a decent view.
Fortunately, they had not been caught by the teachers yet; otherwise, the night owls of the Astronomy Club might have had to retire altogether.
The one who brought up this topic was Ai Cheng Hua Lian, who, while talking about the feats of the club members, led Kagura Hikaru to the door of the rooftop of the old school building.
It was naturally locked.
For safety's sake, rooftops were almost always off-limits.
Even the rooftop of the academic building, which had a wire fence so high it was essentially impossible to climb over, was only open for two hours during lunchtime.