Demon's Meal Is Such a Bother.

Kyou, a young man who lost his family and was living alone, ran into a man collapsed in front of his house. Thinking "It'd be troublesome if he dies here," Kyou let the man rest in house, but as soon as he came to, that man urged Kyou "Let me eat you!!"...?! Turned out that man, Ren, is a demon!!! If he doesn't consume "human's energy" regularly, he'll die. He said, "The energy generated when making love is the most delicious" and invited Kyou to have sex, but was flatly refused! Kyou wanted to...