When I woke up, there she was…
A sexy older woman, passionately sucking on my dick.
Any shock or confusion I might’ve felt was completely meaningless in the face of her long, sinuous tongue wrapping around me.
—Wait, hold on.
Her tongue is way longer than my cock.
I’m Jun'ichi Yamanashi, a hopeless student.
I had no talents, no confidence, and of course, no chance of confessing to the girl I liked. My life was dull and uneventful. Sure, I had a few friends, and even though my mom was gone, life with my dad and little sister was peaceful and happy… was being the key word.
Because this is the afterlife—the Demon Realm.
After my untimely death (or whatever), I found myself in the prestigious all-girls school, “Almadel Academy,” in the Demon Realm. And it wasn’t just the long-tongued school nurse who sent me to new heights of ecstasy. The place was filled with nothing but cute, beautiful girls!
And… apparently, I’ve inherited the soul of the legendary “Demon King of Lust”?!
Wait, what? To avoid causing chaos in the Demon Realm, I have to live at this girls’ school for a while?!
Even if I’m called the “Demon King of Lust,” I’m still the same awkward, inexperienced guy I was in my past life.
I’m worried about the family I left behind, and I want to find a way back to my world. But to do that, I need to learn to control the Demon King’s power and open the gate to the other world, which only appears once every 666 years and 6 months.
…What the hell is going to happen to me now?!

[Translated from dlsite]