Many close tribal and small village communities marry outside of the tribe or village, and many childhood friends end up unlucky, because of this. Most of the time it may be merely implied, but sometimes it's laid out right in the open for the viewer to see. Following real sister tube Her Footsteps When I ask my sister why she wanted to write for Sex, Etc. It is also very common in Japanese works, at least, to see a girl address a boy she's interested in as onii-sama, the ultra-respectful form of. I remember having a conversation about with a friend and not knowing anything about it at all. For example, inMunakata Shiho addresses Tate Yuuichi in exactly this way, and that leads to some fairly serious jealousy of her rival Tokiha Mai.