A request from another forum that doesn't seem to be getting anything, thought I'd post it here. Looking for a brother and sister (preferably older brother/younger sister) with a really rocky relationship, with the pair gradually restoring their relationship in the story. Could be as little as a lack of trust or respect, or something on the scale of one being a full-on villain or acting on hatred toward the other, as long as they're able to call each other family and truly say they love one another by the end. But no incest, or step-incest. Just brother and sister becoming brother and sister once more.

Rental Onii-chan seems to be heading in that direction.