Attempting to fulfill a promise to his childhood sweetheart, Keitaro Urashima is determined to enter Tokyo University. After being rejected twice, he decides to leave home and stay at his grandmother's apartment complex to study. But when he arrives, his grandmother is gone and he finds himself under attack by the all-female residents. Can he concentrate on his studies when he discovers that one of his tenants might be his long-lost sweetheart?

Having passed his exams, Keitaro is off to America to study abroad. Months go by, and then a young girl arrives at Hinata house. Her name is Kanako, and not only is she a master of disguise, but she claims to be Keitaro's younger sister and the new manager of Hinata, to boot!

Keitaro Urashima's dream is to attend Tokyo University with his childhood sweetheart, a girl he hasn't seen in years - and can't remember what she looks like! But when he fails the entrance exams, he's in danger of losing his chance for good. To make things worse, his parents have kicked him out of his house. Fortunately, his grandmother owns the fabulous Hinata Lodge and has agreed to take Keitaro in as caretaker. What he doesn't know is that the lodge is actually a girl's dorm and he's the only guy around!

When Keitaro Urashima fails his entrance exams for the second time, he's officially an unemployed and uneducated slacker. To make things worse, his parents have kicked him out of his house. Fortunately, his grandmother owns the fabulous Hinata Lodge and has agreed to take Keitaro in as caretaker. What he doesn't know is that the lodge is actually a girl's dorm and he's the only guy around!

When Keitaro Urashima fails his entrance exams for the second time, he's officially an unemployed and uneducated slacker. To make things worse, his parents have kicked him out of his house. Fortunately, his grandmother owns the fabulous Hinata Lodge and has agreed to take Keitaro in as caretaker. What he doesn't know is that the lodge is actually a girl's dorm and he's the only guy around!