Ane Log: Big Sister Moyako's Never-ending Monologue is a oVA anime that premiered in fall 2014, produced by Brain's Base.

About the production: the story comes from a manga, there are 3 episodes of about 23 minutes and its current status is "finished".

Its main genres are comedy, ecchi and slice of life, with themes such as Shounen, Family Life, School and Female Protagonist.

On AniList, Ane Log: Big Sister Moyako's Never-ending Monologue has an average score of 56%, an average score, and appears on 10,890 users' lists.

When Konoe Moyako and her little brother, Akira, were young, he said he wanted to marry her. Naturally, Moyako decided that her little brother was a complete pervert who was obsessed with her. Now that they're both teenagers, Moyako is convinced she needs to "rehabilitate" him. However, it seems that the "perversion" is entirely in her imagination, and she can't seem to help turning completely innocent situations into creepy ones in her mind!

Official synopsis from AniList.