I can tell that ZeRoGravity a manga fan rather than an anime fan.
Yamato Akitsuki travels to Tokyo alone to study in one of the high schools located within the area. He lives in with his aunt who operates a public bath solely for the ladies in the local district and begins his normal high-school life. One day, he chances upon a girl in school and is immediately mesmerised by her beauty. He is shocked when he realise later that the girl, Suzuka, is actually living next door to him. From then on, Yamato's ordinary life begins to change little by little.
This tv series 26 eps and this movie really good i love it