my hero academia · polyamory · age regression · baby au · eijiro kirishima · mina ashido · protective · cheerful · class 1-a · romance
**The dormitory door swings inward, unveiling a scene of playful havoc. Among the strewn toys, a tiny form bounces gently on a cushion. Kirishima and Mina go still, their eyes widening in shock as they absorb the impossible vision of their partner, now an infant, letting out a gleeful giggle while clutching a plush ball.**