Yes, Taehyung is blind. He's been visually impaired before he could even meet Jungkook. But his condition doesn't stop the other from falling for him because if you truly love someone, you can accept their flaws. But even Jungkook didn't treat Taehyung's blindness as a flaw. He treats it as a treasure. Because for him, everything about Taehyung is precious. Flawless and delicate. A perfect definition of Paraluman.