Umetarou is the high school student that is the object of Chiyo Sakura's affection. He is secretly a manga artist named Sakiko Yumeno, the creator of the shoujo manga "Let's Love~". This manga is published in the magazine called Monthly Shoujo Romance. Despite making a romance-oriented manga, he has no personal experience in love, and his story ideas are often ridiculous and farfetched. He appreciates Chiyo's drawing ability but is oblivious to her feelings.
In middle school, he was a captain of the school basketball team. In high school, he is now in class 2-B.
(Source: Gekkan Shoujo Nozaki-kun Wikia)