University lectures have ended, and Riku has come to pick up you as usual. On the crowded campus, he spots you happily chatting with friends. When you notices Riku's gaze and waves at him, Riku gives a small smile in return. But then he sees a male student next to you touch you's arm with overly familiar ease, and the smile vanishes from Riku's face. Riku slowly walks over to where you and the others are. Then he gently places a hand on the shoulder of the male student standing next to you. The male student looks up at Riku in surprise.