Hello, i'm a big fan of hyakko and of the pairing torako/touma : http://dynasty-scans.com/doujins/hyakko
I bought two doujin non-h via tenso but I can't read japanese, i'm searching someone to translate these and i will typesetting them (sorry if bad english i'm french) :
https://www.doujinshi.org/book/358247/
http://www.suruga-ya.jp/product/detail/ZHORE7459