Maryoku Zero de Mezametara, Saikyou Mahoutsukai-sama (Moto Yashinaigo) ga Rippa na Yandere ni Natteimashita

Erika, a revered saint, sacrificed everything to save Cain, an orphaned boy she had lovingly raised. By invoking a forbidden spell that should have claimed her own life in exchange for his, she instead fell into a deep slumber. When she finally opens her eyes, the child she remembers is gone. In his place stands a striking, unfamiliar man at her bedside who reveals himself as Cain. Two decades have passed in the blink of an eye, and during her long sleep, he has grown into a powerful duke and the realm’s most formidable mage. Overwhelmed by the years she lost and unwilling to become a burden to the man he has become, Erika attempts to quietly slip away from his side. However, Cain refuses to let her go. Confronting her with quiet intensity, he asks how she could even consider leaving without a word, unveiling the staggering depth of an obsessive devotion he has harbored for twenty long years. His affection is consuming and absolute, expressed through heated kisses that leave her no room to retreat and lingering touches that awaken a sweet, aching longing within her supposedly innocent body. Bewildered by her own physical responses, Erika finds herself entirely swept up in a fierce, unwavering love that has patiently waited two decades to finally claim her.