Started work on an Ero Manga (Pixiv Fanbox)

I am planning an ero manga, more vanilla with a light tone about a ninja and her lord with a crippling porn addiction. The setting is a fictional ancient Japan where the shogunate has banned shunga. A daimyo with a crippling porn addiction would send his kunoichi out to secure naughty pictures for him much to her chagrin. I guess they also fuck and said daimyo is engaged to the Shogun's daughter. So he's legitimately that son in law that noone is proud of if is secret was to be discovered.