Sakura-sou no Pet na Kanojo

Sakura Dormitory is a dorm of the high school affiliated with Suimei University of the Arts (often shortened as Suiko), which hosts the strangest, trouble-making students. After being kicked out of the normal dorm for keeping a stray cat, Kanda Sorata moves into Sakura Dormitory. As he starts to get used to the life in the dorm, Shiina Mashiro, a world famous artist who cannot even take care of her daily life, moves in. Sorata is forced to become Mashiro's handler. The story is about their daily life as well as mental growth. [Edited from Wikipedia]

Suiko-high has two dormitories, one of them is for normal students, the other, Sakura-sou is for students who'll drive normal students crazy. Kanda Sorata is a boy who attracts stray cats and can't throw them away, for this, he is thrown out of the normal dormitory. In Sakura-sou, he meets the odd prodigies and is in charge of taking care of them. With them, he finds his dream and perhaps, his soul mate. The gamer becomes Sorata and is tasked to take the first prize in the game-making competition. Create a team out of all the oddballs in Sakura-sou. There are aspiring artists, screenwriters, and seiyuu living in the dorm, meet with them, converse with them and take care of them as you create a proposal, an alpha version, a beta version, and then the final product. As your game completes, cement your bond with a very special girl.