Numarase Otome o Dekiai Shitsukusu Ore no Hanashi.: Oni Buchou ga Sosogu, Amakute Omoi Mitsu no YoruNew沼らせオトメを溺愛し尽くす俺の話。～鬼部長が注ぐ、あまくて重い蜜の夜～; My Story of Doting Endlessly on the Girl Who Sinks Me: The Sweet, Heavy Honey Nights Poured by My Demon Boss

Tya Mut is a sales department manager feared throughout the company as a "demon" for his cold, unapproachable demeanor. Yet this ruthless man has fallen in love with Rikka Kat of the marketing department. Because of her striking good looks, Rikka is assumed by everyone around her to be experienced and flashy with men, but in truth she is a virgin who is a complete novice at love. Tya finds himself constantly at the mercy of the real Rikka that no one else knows. After a certain incident brings the two of them closer together, Tya gathers his courage and confesses: "Kat... how about trying love with me?" But instead of being taken as a romantic confession, his words are treated as nothing more than "love lessons." Though he hides a fierce possessiveness beneath his composed exterior, will the demon boss's feelings ever reach Rikka's heart? A sweet yet heavy office romance born from crossed wires and misunderstandings now begins.