DIVE II Entertainment. Terminal is credited with the original work.
The three OVAs of
Ane Log - Moyako Nee-san no Tomaranai Monologue (Sister s Log - Moyako s Monologue That Won t Stop) debuted in 2014-2015. Sentai describes the story:
Kids say the darndest things, and in Moyako s opinion, her brother says the strangest things of all! An innocent childhood declaration that he d one day marry her has convinced Moyako that her brother will grow up to be a total perv, and now she reads the worst into their every interaction. Surely it s a big sister s job to rehabilitate her little brother, right? Only Moyako might not be up to the task, because she s the one turning otherwise innocent situations into perverted scenarios!