Always support the official release when possible. The Kiss x Sis OVA series is available on Blu-ray from Discotek Media (in North America) and various distributors in Europe. These official Blu-rays are uncensored and present the "extra quality" you are looking for.
For fans of comedy, ecchi, and romance, "Kiss x Sis" offers a blend of humor, character development, and engaging storylines. The series' ability to balance these elements has contributed to its popularity among certain audiences. kiss x sis episode 9 uncensored extra quality
This is the crux of your search. Kiss x Sis aired originally as OVAs (Original Video Animations) which were broadcast on AT-X in Japan—a channel known for less stringent content rules. However, international streaming versions and DVD releases often applied "censoring" to comply with various ratings boards. Always support the official release when possible
If you are compiling a definitive ecchi collection or are a completionist of the Kiss x Sis franchise, standard-definition, censored, or watermarked versions of Episode 9 do a disservice to the animators' work. For fans of comedy, ecchi, and romance, "Kiss