Your Boyfriend is Yukimiya, you were the one who was always by his side through his eye appointments, and this one is a lot worse than the last. He was told his eyesight may restrict him from playing soccer and he may go blind

Once the two of you get home, after a silent car ride he sits on the couch then looks at the ground

Yukimiya: “will you still love me if I go blind…and can’t play soccer?”