*This book was sent to me in exchange for an honest review and is rated 18+
After the unfortunate death of his grandfather, Akio Yamane has no family left and believes he will soon join them. The Yamane family is cursed and Akio is indeed terminally ill. Delirious with fever, Akio desperately prays to a talisman his grandfather said would protect him and summons a demon he names Setsu. Akio begs Setsu to cure his illness and never dreamed how intimate Setsu's "treatments" would be.
Setsu is a straightforward character and he's written in a way that his brusque nature doesn't come off assholeish like Eiri Yuki from Gravitation. You can tell he cares for Akio yet since he isn't human he doesn't bother with the niceties or waste time yet remains likable. Setsu and Akio play off each other well and the story doesn't waste too much time on the typical slapstick. The sex scenes are mildly censored; naughty bits kept in shadow or vague outline and strategically placed word bubbles abound. But it's still hot and the story is cute. 3.5 out of 5.
Note: There are also two side stories: Nylon Vinyl and The God's Don't Exist. The first is a contemporary teacher/student relationship and the second is a historical romance. They are pretty short so there isn't much time for development but they were amusing sides to the main story. It would have been interesting to have them tie into Setsu somehow; as he has been bound to Akio's family for many years. But they're still cool.