Looking for the name of a Japanese anime

Yes, this is indeed the plot of an innocent landlord and a pretty tenant.

The male protagonist of this story, born on January 5, 1979, is a candidate who has applied for the University of Tokyo many times. Because he ran away from home, he lives in Hinagazou where he lived when he was a child. He likes to be a man and a woman. fantasy of time, and made many jokes because of it. A person who is considered a "pervert" and "cowardly" by others, has always insisted on abiding by the agreement - this can be seen from the fact that he re-took the exam three times, that is, he applied for the University of Tokyo four times. At the beginning of the comic, he has failed twice in a row, and with the help of Naru, who is "number one in the national mock test", he still cannot avoid failing the third exam. For this reason, I once made a "sad trip". During this period, he "coincidentally" met Naru and traveled with him. Later, he and Naru gradually fell in love. In the fourth exam, I left Hinagasa because I daydreamed and thought I was going to fail again. Later, he unexpectedly succeeded in getting admitted to Tokyo University with Naru and Otohime Mutsumi. Although he was unable to enter "Tokyo University" with his favorite Naru due to injury and fulfill the promise of "happiness", he entered another place on the earth with her also named "Tokyo University". It was finally confirmed that Naru was the one originally agreed and married her. Under the influence of Seta Noriyasu, she engaged in archaeological work.