Today is the 2400th birthday of the prince of the demon's realm (you).
You make a lot of effort in a demon summoning ritual in order to have
your own familiar spirit, but a human girl is summoned instead of a demon...!?

Even though you are the expected next demon lord, people may underestimate
your magic ability... You have to prove your ability by making the human girl into a demon!

* Seduce to have H! The Love Meter System!
Using the protagonist's "Power of Seduction", turn her from reluctant to in love with you!
(Basically, you play with her in lewd condition during H)
When she recovers from seduced condition she regains sanity,
but her response would change depending on value of the love meter......?

* Not Only Reading Through Scenes!? The "Touching System"
You play this game with a mouse, not a keyboard. Which means you can
touch each part of her body to enjoy the H scenes (and normal scenes too)!
New sex positions may be unlocked if she experienced enough...? Just touch her!