i found the 1981 story board for this on nhentai just now and decided to google the manga's name, kinda scared me when i saw it uploaded here less than a day ago
considering Okita Alter isn't a thing (yet) in the story, i'm hoping they'll team up with Ryoma next, i need some screentime for my baby girl Oryou and i really wanna see her transformation drawn in this artstyle