Based on Michiking's popular erotic manga, Seikatsu Shuukan THE ANIMATION is a two-episode OVA directed by Kazuhiro Ohara (known for Nudist Beach ni Shuugakuryokou de!! and Real Eroge Situation). The story follows perverted high schooler Shuntarou, whose incestuous fantasies revolve around his three mean younger sisters. After they catch him using their underwear, their hatred intensifies. Desperate for a gentle older sister, Shuntarou activates a mysterious game that transforms him into a young boy. Posing as Koharu, he receives overwhelming love and sexual attention from the sisters, who reveal their hidden shotacon tendencies. What begins as innocent "big sister" play quickly escalates into intense, passionate encounters filled with affection, teasing, and raw desire.

The OVA faithfully adapts the beloved "Sister Experience Week" arc, delivering classic onee-shota themes with high-quality animation, expressive character designs, and plenty of erotic scenes. Volume 1 focuses on the initial transformation and encounters with Ayaka and Fuyuno, while Volume 2 dives deeper with Chiaki and culminates in group play. It's a dream come true for fans of incest, shota, and affectionate harem dynamics. Produced by Pink Pineapple in 2019.