When Tsuyoshi rushed to school as usual, he found a girl who tried to help a kitten which couldn't get down from a tree. It was Minamizato Ai who had loved Tsuyoshi secretly for a long time. (Source: AniDB)

Following the line of the precedent OVAs (of the same name) This anime goes around the normal lives of some elementary school (5th grade, 2nd class room) kids and their adventures, while turning to teens. Their games, stupid jokes, and the misunderstandings around their premature attraction to the opposite sex. Ryota Satou is the main character here, but his friends are almost as important as him since the school wouldn't be the same without them, especially the girls who the majority of time appear to be mature by their ages but in the ends they are as childish and even more "dangerous" than the boys. (Source: ANN, edited)

Hot Spring-themed OVA of Haiyore! Nyaruko-san W.

The day before her birthday, Akane is asked to retrieve her birthday present from her aunt Chi's shop. While looking around, she chances upon a mysterious slab with a hand-shaped cavity in it. Curious, she places her hand in it, and—to her surprise—it fits perfectly. The next thing she knows, a strange alchemist named Hippocrates and his apprentice Pipo appear, calling Akane the legendary "Goddess of the Green Wind." The two eccentrics claim to be from a different world connected to the shop's basement. With the peace of their world in jeopardy, Hippocrates and Pipo seek the help of the only one capable of saving it from destruction: Akane. Forced to accompany them on a journey to restore the land's harmony, Akane—with her aunt in tow—sets off to discover a magical new place. [Written by MAL Rewrite]