OniAi

Akito Himenokoji is a seemingly ordinary high school student who has recently been experiencing strange nosebleeds. He discovers that these nosebleeds are triggered by his older sister, Akiko, who has an intense and inappropriate obsession with him. To cope with this unusual situation, Akito attempts to distance himself from his sister and find normalcy, often with the help of his friends and a mysterious girl named Tsubasa. The series follows Akito's comedic struggles to navigate his sister's overbearing affection and his own budding romantic interests.

OniAi was a niche anime series that garnered a mixed to negative reception from critics and audiences. While some appreciated its comedic elements and lighthearted approach to a taboo subject, many found the plot premise uncomfortable and the execution lacking. The character development was often criticized for being shallow, and the humor was deemed repetitive or immature by many viewers. Despite its flaws, it found a small audience within the harem and comedy anime genres.

• The central premise involving sibling attraction was uncomfortable and poorly handled for many.
• Character development was seen as weak, with most characters fitting into typical anime archetypes.
• The humor relied heavily on slapstick and awkward situations, which became tiresome for some viewers.

Google audience: Audience reviews for OniAi are largely negative, with many viewers finding the incestuous undertones unsettling and the humor to be juvenile and unoriginal. Some acknowledge a degree of watchability for fans of the harem genre, but overall, it is considered a weak entry with little lasting appeal.

The series is based on a light novel series of the same name written by Tomohiro Tsukimisato and illustrated by Rin.