Well, after so much insistence, here it is. The Seventh Volume of the Yandere One-Shots.

De las cenizas de una vida monótona, un amor floreció entre una mujer humana y un noble demonio. Su legado es Issei Phenex, un joven que carga con la calidez de su madre y la gracia de su padre. Su destino, ligado a Rias Gremory, la poderosa heredera del clan del diablo, no es una obligación, sino una alianza de almas gemelas. Con el corazón de un dragón ardiente latiendo en su interior, Issei y Rias se unen para buscar la paz, demostrando que un amor tan vasto como el suyo puede forjar un futuro donde el afecto no conoce límites y una familia puede ser tan grande como un mundo.

The girls from 1A, 1B, Mei Hatsume, Nejire Hado and Melissa Shield decided to have a girl's day and they took Eri. She was a bit shy wanting to be with Izuku. The girls wanted her to have a good time but she didn't put in the effort. They understood as they were talking about Izuku and their huge crush on him. When they noticed that Eri was missing as they tried to find her but they couldn't until they noticed her with a green haired woman. They went toward her as Eri explained that she feels safe. The girls didn't know why until the woman spoke up. Inko: You must be my son's classmates Kyoka: who is your son Ma'am? Inko: My son's name is Izuku Midoriya The girls immediately tense up as they just meet their crush's mother. Eri really like the woman due to her resemblance to Izuku. So what would happen find out