In this OVA we can see most of the part of the anime tv, but this time we can see it from the point of vew of Kokonoe Rin entirely, were she decides that the profesor will be yours but she have time to lear and grow up.

Kodomo no Jikan Nigakki picks up the story with Rin and her classmates beginning fourth grade. While Aoki and Seiji remain suspicious of each other's intentions regarding the young girl, Rin unexpectedly becoming the class representative continues to confuse Aoki in his attempt at understanding the precocious child.