Ane Chijo♥Max Heart

On paper, Kisaragi Sarasa has everything under control — top of her class, composed, and well-liked — a model student by every measure. Then her younger brother Kira enrolls at her school, and she invites him to her room to celebrate. What she has planned, he has absolutely no idea about. That gap in expectations is where this 4-episode OVA from PoRO sets up camp and stays. Based on a light novel, Ane Chijo Max Heart leans into the comedic awkwardness of two siblings suddenly sharing close quarters, with Sarasa driving most of the chaos while Kira fumbles to keep up. The harem setup layers in additional characters as things progress, but the sibling dynamic stays front and center. The animation holds up well for the genre — expressions and character reactions get real attention, which makes the comedy land alongside everything else. If you've seen something like Imouto Paradise and want a version that puts more weight on the older sister's perspective rather than the younger sibling's, this shifts that balance noticeably. Fans of Oni Chichi who want something lighter in tone will find this more playful and less intense. It is unambiguously adult content, so go in knowing that, but the blend of humor and sensuality keeps it from feeling one-note. Four episodes means it moves quickly without dragging the setup out longer than it needs to.