I believe this special is better than its parent. Oneechan ga Kita is a rather short and sub par sis-con series. on the level of Kiss x Sis but without the fan-service. Its an unfunny comedy with each episode being a sketch finishing in a bland punch line involving the sister coming on to the brother and then him after initially being put off he starts to think it may not be that bad. However after watching the special I feel like it wasn't that bad. Hear me out-the special wasn't amazing in fact it was pretty average, however it actually had a conclusive story over the full 4minutes. This special tells of the sister and the borther's meeting and the sister's obsession with having a sibling.

I would not recommend the series as a whole but if you have already sat through the rest of the series I say its best to watch this as well-its only 4 minutes after all.