Genre: Action, Comedy, Ecchi, Harem, Romance, School

Keitaro has finally passed the entrance exams, and is officially a Toudai student. But after breaking his leg in an accident in the entrance ceremony, he thought and re-evaluated himself. Having new goals, Keitaro follows Seta on an overseas archeology trip. During his absence, however, all was not well in Hinata Lodge. Urashima Kanako, Keitaro's sister, arrives on the scene. She claims to be the new manager of Hinata Lodge starts to go against all the tenants. Things become even more complicated when they recieve a letter from Keitaro. The tenants and Kanako made a big mess trying to get the letter, but Seta's car crashes in before anyone could read the letter...
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 Keitaros 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.