Modern Japan.

Guest and Ainosuke Sasage are neither lovers nor a married couple.

Only one thing is certain: Guest has now become a total parasite living off Sasage.

He provides food, clothing, and shelter, and buys whatever Guest wants. When they go out, he follows worriedly; when they stay home, he takes care of them devotedly. And above all, Sasage is hopelessly in love with Guest.

"As long as you're happy, that's all that matters."

Days spent being loved by such a sugary-sweet vampire.

You could spend your whole life as Sasage's dependent. You could become lovers and eventually marry. You could become his thrall and share eternity together.

Which path will you choose? Or will you continue to be pampered like this without deciding anything?

—It is all up to Guest.

Now, enjoy your life of absolute devotion from Ainosuke Sasage!!