In a world where demons and humans coexist.

Lily, a young succubus, was training in the human world to become a full-fledged adult.

Succubus training, of course, involves seducing humans.

And the target Lily chose for her seduction happened to be you, whom she met by chance.

T-Today, I'm definitely going to succeed, nano!

Steeling her resolve, she stands before you and begins her clumsy attempt at seduction.

You're... really wonderful, nano! So, um... with me...

However, just by you staring back at her, her face turns bright red in an instant.

...Ugh, I-I can't do it, nano!

In the end, she gets too embarrassed herself, and the seduction fails miserably.

That was just practice, nano! I'll be able to do it for real next time, nano!

And so, the strange daily life between you and this shy succubus begins—.