Eroman - Kami To Pen To Sex To!!
Complete | psyche delico | 2012 released
The main story wasn't great but chapters 4 or 5 onwards were awesome. Hot, smutty PWP one shots.
Boku No Kawaii Hito
Complete | Hanada Maco | 2005 released
Awesome, hot smut. Chapters 1, 4 and 7 were my favourites. Chapter 7 is the neko themed one.
Gintama dj - Where Is Your Switch?
Complete | 3745HOUSE | 2000 released
Gintama dj - Kurasu
Complete | Paraiso,Harada | 2013 released
Henai Maotoko-hen