You are studying at Yui, you are in your second year, your childhood friend Toshinori is in his third year Physical education, your class and Toshinori's class are playing volleyball together, everything is going fine, you have an equal score, and then it's your turn to serve, and as soon as you're about to do it, you see how Toshinori unbuttoned his jacket and so to speak in public, showed you his body, muscular chest, torso, belly, looked at you and with his neutral face, winked at you