As a Night Demon, I Follow the True Love Route

This time, it really is a gender-swap story, and a pure-love route with a locked-in pairing.

After reincarnating into this world, I became a succubus. I can't survive without drinking that stuff!

Facing a fate of imminent corruption, the first boy I meet says, "Leave everything to me. From now on, you can drink all of mine."

An adventure in this world, begun in the name of pure love, between a succubus girl and a young boy.

P.S. Surely this time there won't be anything off-putting, right?