What Yandere? He’s Just a Wooden Dummy!

[Mutual first loves, sweet romance, one-on-one, an outwardly cold but secretly lovesick monster male lead who constantly tempts her in all sorts of ways x a genuine human log of a female lead who falls for his temptations and loves just that sort of thing] A message from the short-message assistant arrived: "Please [garbled]..." "Please win over this NPC: Elifa." The unknown creature controlling the little assistant sent this directly: [Invitation button] [Come be my savior, An'an.] Yun Yun'an thought the task she'd been given was strange. Wasn't she supposed to "win him over"? Why couldn't she use a knife? He was always so cold and aloof, yet unexpectedly innocent. Just holding hands made him blush. He was like a solid, earnest wooden post. Little did she know, at night, he was the one who kept kissing her lips, the one who left marks on the back of her neck, and the one who tasted every drop of her sweetness... When daylight came, Elifa was still the same guy who got shy and buried himself in her arms at the slightest kiss. He timidly asked, "Baby... I want a real kiss." Yun Yun'an was coaxed and tricked into wearing a wedding ring by that adorable little act of his. It wasn't until they got down to business that she realized she'd been duped. Just as a hint of regret crossed her mind, wisps of black thread wrapped around her. His breath and warmth enveloped her completely. "I must not be making Baby happy enough..." Enough, enough! I said enough! (Note: The male lead is not human and has a strong dark and perverted streak. The two leads are equally obsessed with each other, and neither has any romantic involvement with a third party.)