He's perverted, malicious, a devil that calls himself 'Oresama.' His true character is...?

The Demon King, Char, from a parallel world called Avalon, fell in love with the daughter of a shrine, Hashiba Rin. Both their hearts and bodies have been entrusted to each other, but a first love, Shou, confesses to Rin!?

(Source: Nevermore Scans)