Youko turned around, following Aiko with her eyes, stammering. "She...s...she is... is nnnn not wearing... panties." It needed her a good while to gulp down the picture that was burned into her memories, then followed Aiko upstairs, slowly... and just had entered her own room before Aiko left her room. Youko sat down on her bed, with her mind reeling, while her door was wide open again.