I'm going to leave out ones where a family member doesn't like it for love triangle reasons; Doushiyoumo Nai Keredo (in the Tight-rope chapter; b/c they're gay), Empty Heart (overprotective family member; brief plot point), Junjou (b/c they're gay), one of the Kuroneko books (social status reasons), Kiss Me Princess (overprotective family member / b/c they're gay, Kizuna (b/c they're gay; very brief plot point), Warui series (overprotective family member; not a plot point), Mousou Elektel (b/c they're gay; very brief plot point), Saa Koi ni Ochitamae, Challengers (b/c they're gay), Hyper Love Power (forbidden), Sick (overprotective family member), Shitsuji wa Oose no Mama ni (b/c they're gay). I'll let you know if I think of any more, lol.
Any yaoi with teir parents that are against their relationship???