In this second season, a three-episode OVA follow-up to Kodomo no Jikan, Rin, Kuro and Mimi have moved up a year and are now in the fourth grade. Rin still wants Aoki to become her boyfriend and keeps pursuing him in perverted ways. Kuro has come to look up to Shirai-sensei as her idol, while Mimi still has no confidence in herself. Based on Watashiya Kaworu's seinen manga, it adapts the fourth grade storyline as an ecchi comedy.