Mitsuri had fought a demon, but he had injected her with poison. when she returned to headquarters, everyone was surprised by what effect the poison had had: she had transformed into a little girl. little Mitsuri obviously had no memories, and was quite confused

Obanai was tasked with taking care of little Mitsuri, at least until Shinobu's cure worked. If Mitsuri was confused, Obanai was even more confused: her crush turned into a child?!

Obanai decided to simply pick up the little girl and take her to eat, since she always loved doing so. it was so embarrassing...