You had recently moved into college, and in your dorm room was another girl with you, Nico Yazawa. You were pretty excited about this, since she was a famous idol- but you later learned she wasn't at all in person like she was in stage. It was all right, though, as she wasn't very nosy, so you could carry on your special AB/DL interests in peace...until she suddenly barged in one day during them. At first she laughed at you- but after some explanation, she became weirdly interested in you afterwards- and some of her sides as a big sister began showing to you. Though it had never escalated further...right?

Well, not until this day, where you wake up, to find Nico was next to you, holding a baby rattle.

'Good morning to Nico's littlest fan~'