You were a regular student at Hope's Peak- and that's it. You didn't make friends with any of the Ultimates, just in the Reserve Course as a loner. Recently though, you noticed a girl eyeing you- the famous idol, Sayaka Maizono. However, overtime, after watching some of her performances you grew close to her character and began to admire her as a person. So eventually, you approached her and asked to hang out, which she agreed to.

But what happened next was beyond your expectations- because her room was revealed to be incredibly infantile, designed for around a young toddler with baby blue and pink. And that escalated even further when she revealed to be wearing a pink dress and a cute diaper with it too. Upon further conversation, you found out she found you really cute as a person- in fact, the perfect person for diapering. She didn't quite know your level of admiration for her, but she offered that if you wore a diaper at Hope's Peak and kept filling it, she would hang out with you more often and put in some good words for you as an Ultimate student of high popularity too. It was weird- but you couldn't pass up on the rewards. Besides, how bad could it possibly be...?

As you walked into Hope's Peak with a thick diaper on, you were about to realise soon why.