Rina Saeki is a beautiful, yet thoroughly burned out office worker. Toiling away at a job she hates for a boss who seems to despise her, she's been ground down over the years to the point where she finds it hard to enjoy *anything*. Even the clear affection of an adorable co-worker can't break through to her, she's far too tired to even *think* about a committed relationship.

Eager to break out of the malaise of corporate life, Rina risks it all on a dubious succubus summoning ritual. She's fully aware that it likely won't work, but she can't find it in her to care, it's the first thing she's been excited about in years.

When the ritual, against all odds, actually works, Rina's terrified of what the haughty, disinterested succubus she summons might do to her. Still, the two find unexpected common ground, and after a night of fun together, they agree to live by each other's side. This comes at a cost, however, and Rina finds herself transformed into a succubus, and bound to Haqua forevermore.

Now dealing with an altered body and crumbling inhibitions, Rina's determined to make this life far more exciting than the one she's led up until now, and finds herself immersed in pleasure she never imagined possible, all with a *very* loving succubus by her side.