Bouzu to Kumo
Complete | Haji | 2015 released
Basically Minekura Kazuya's Saiyuki, now with explicit sex and more spiders and none of the reincarnation angst. A monk finds himself traveling with his spider-human lover. The setting lends itself quite naturally to all varieties of mildly kinky sex scenarios, like bondage (with spider webs!) and tentacle/nine-tails porn. There's a plot point introduced midway about the monk's true nature that is promptly dropped, for lack of a better word, but on the whole, charming and sexy and funny.
Bouzu Kawaiya Kesa Made Itoshi