Dear Sister, I've Become a Blessed Maiden #1

Plot

When a man takes his sister’s place as a blessed maiden, his body becomes a magical tool for an arrogant sorcerer in this sexy Boys’ Love fantasy manga!

One morning, Umehiko and his sister, Momo, were getting ready for school and work when a mysterious symbol appeared in the sky. Next thing they know, they’re in a strange, new world. But Umehiko is only concerned with ensuring his sister gets home safely. And right as he sends her back, he’s forced to stay! Theodorus, a powerful sorcerer who’s been tirelessly trying to summon a blessed maiden, declares that Umehiko will become his spring for unlimited power. Instantly, Umehiko is overcome with uncontrollable lust—that only Theodorus can satisfy. Can he endure being the sorcerer’s new ‘blessed maiden,’ or will he find a way to escape?