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Ding!
[The Effects of the [Demon Goddess of Lust's Succubus Arts: Lv1] were active through an intense and long night of sexual activities.]
[Your sexual partner has recovered from major wounds, their exhaustion has been healed, and they now feel much better… However, you've also drained them off 50% of their energies, which will recover quickly over time.]
"W-What did you use on me last night?" Frank felt slightly confused. "It was like a strange magic spell…"
"It was a spell that enhanced your strength in sexual intercourse." I giggled. "It was a bit of… help for you." I sensed a lot of Cosmic Energy gathered inside my body as well.
"But I even feel… stronger? My stats increased as well! And some of my Skills became stronger too…" Frank was shocked. "I can't believe having sex with you makes me stronger…"
Check "The Protagonist's Sister Is Actually the Strongest"!