Mahou Shoujo wa Kiss Shite Kawaru / Magical girl Kiss transformation

Ken and Iori confessed their love to each other, and now everything should change - sex, wedding, family, children... However, this is not destined to happen - on the day of the confession, a terrible monster attacks the lovers and kills Ken-kun. When Iori is in despair, a stranger comes to her and says that if she agrees to become a magician, he will help the guy...