Ice Cream Kanojo

Ice Cream Kanojo manga, アイスクリームカノジョ,
Except for being a little short, Kanta Date is a completely ordinary high schooler. This nobody however, managed to get a girlfriend. This girlfriend is a real poker-face and to the world, seems cold as ice. However, just for Kanta, she is really sweet. Different from her outward appearance and sweeter than sugar, she always manages to overwhelm Kanta.