Before anyone complains like the cover shows it's a Aki x Denji x Power threesome book, so there's both straight sex involved with Power and gay sex with Aki. There's also a looooot of kissing.
Summary:Aki, Denji and Power are in a relationship and both of them got the hots for Denji (who wouldn't). Both Aki and Power try to surpass each other however Denji loves both of them. The demon inside Denji makes him feel pleasure whenever he's praised so at the end the 3 of them have a intense sex where they praise him a lot, making him orgasm each time.