Kaichou-san Chi no Ko Neko

Because of his much-too-strict character, the excellent and capable student council president, Hayami Reiichirou was isolated from his surroundings. But, one day, he is forced to take care of a kitten he received from his mother who is in the middle of divorce. Seeking help from the resident cat-lover in the student council, Shiraishi Kotoko, there is...?! (Source: Shoujo Crusade)

Also contains the one shot Gakuran Ouji.