Look, I'm gonna be a little blunt here. The best Budo x Taro stuff doesn't live on the big-name, mainstream platforms anymore. The golden age for that specific ship was on Tumblr and small, now-defunct forums back in the day, where writers really dug into the yandere potential and the psychological horror of it all.
Now, most of the surviving classics and the few new writers who 'get' the dynamic have migrated to Archive of Our Own, because it's the only place with decent tagging that lets you filter for the intense, dark romance that pairing is built for. Wattpad's full of watered-down, high-school AU versions that miss the point completely. The real gems are in the older collections on AO3, often tucked into 'Yandere Simulator' fandom tags, written by people who understand that Taro's obsession isn't cute—it's genuinely terrifying, and that's what makes the tension so compelling. I spend hours trawling through the back pages there, and it's worth it for those rare finds.