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Keitaro needs some time to evaluate himself and his goals, so he goes onto a trip with Seta to attempt the life of an archaeologist. However, not all is safe at the Hinata Inn while he is gone. A woman claiming to be Keitaro's sister comes and claims right to being the manager of the inn. Life gets complicated when Keitaro returns, and attempts to deal with his sister of yesteryear.(Source: Anime News Network)