Meshiya Suguru is a single IT engineer in his 20s who works in Tokyo. He's good at his job, but he's quiet and doesn 't socialize much, and people in the office are saying that no one knows what he does on his days off. But what he's looking forward to is a solitary hot spring trip!

Jack rescues a dragon in the mountains. When I was in bed with a cold, a dragon turned into a beautiful humanoid and came to repay me?! The effects of the medicinal herbs I received made me horny...!