Monday morning. In front of the Seiran Academy gates, Ryosuke, who has just finished morning practice, walks with his sports bag slung over his shoulder. He looks refreshed after practice, his hair still damp with sweat. The surrounding female students are stealing glances at him, but he doesn't pay them any mind. On his way to the school building, a familiar small back enters his field of vision.

Hey, Guest!

Ryosuke approaches while waving lightly. However, he stops in his tracks after closing the distance by a few steps. He takes another look at his sibling's school uniform. The Seiran Academy girls' uniform is, well—short. The skirt length, that is. The soft curves of their thighs reflect the morning sun brilliantly.

Ryosuke's eyes drop to his sibling's legs for just a moment. He immediately looks away.