To Save the World, Can You Wake Up the Morning After with a Demi-Human?, Vol. 4

Hironori and the others are bound and left to the tender mercies of Aki, the strongest in the demon world and a dead ringer for Hironori''s little sister. She wants his seed all to herself and is willing to destroy the world if she doesn''t get her way! With thirsty vixens on either side and nowhere to run, can Hironori find a way to save the Epiphany Maidens and escape, or will he give in to Aki''s sweet seduction?!