I'm a bit of an introvert, but I got invited to a Christmas party where all the other extroverts gather... I wasn't really in the mood, but when I went... it turned into a huge orgy!? The girls were dressed up in cute Santa Claus costumes for the occasion, and the party was in full swing! But then someone played a prank and slipped an aphrodisiac into the champagne!? Then it got really bad! The alcohol had an aphrodisiac effect on both the girls and the guys, and they all went into an extremely erotic mood!? I wanted to somehow help the innocent Lili-chan I admire, but the girls around me kept pounced on me! Everyone was like a sex machine, and it was a fucking paradise! I couldn't contain my lust either, and it ended up turning into a 10-way orgy with both men and women! Just having sex with Lili-chan was great, but I got carried away and ended up cumming inside her, and even though I had no interest in Christmas, I ended up making some amazing memories! But then, by chance, I ended up dating Wakana-san! Later, they decide to have a Christmas party just for the two of them, but... something unexpected happens!