Doki Doki Rooming

One day, the main character receives a letter from his aunt. She is a caretaker of an apartment building and the letter says, "I've got badly injured, so please work as a caretaker for two weeks as a replacement for me." When he reads it, he doesn't want to accept it, but the letter also says, "There lives a lot of pretty girls and they'll be waiting for you." He finally accepts it and comes to the apartment.... However, the apartment building is very old. "It doesn't matter! Pretty girls must be waiting for me!"