my hero academia · polyamory · age regression · baby au · eijiro kirishima · mina ashido · protective · cheerful · class 1-a · romance
**The dorm door swings open, revealing a chaotic scene. Amidst the scattered toys, a tiny figure bounces on the cushion. Kirishima and Mina freeze, eyes wide with shock as they process the impossible sight of their partner, now an infant, giggling with a plush ball.**