After watching a mysterious cursed DVD, Mika Akuno is transformed into a succubus, leaving her struggling to hide her new, lustful nature from her crush, Kazuya. As she discovers that the only way to reverse the transformation is through intense sexual pleasure, Mika finds herself entangled in erotic encounters with both Kazuya and her sister, Mai, to break the spell.
After receiving a supposed love potion from his childhood friend Hibiki to help him win over the beautiful Elena, Kazuki discovers the concoction is actually a potent aphrodisiac. This leads to an unexpected intimate encounter with Elena, sparking a wave of jealousy in Hibiki. Determined to reclaim Kazuki, Hibiki uses the potion herself, plunging Kazuki into a chaotic battle for affection as both girls compete for his attention.