Oneesan to Joshikousei

"Please don't tell anyone about me!" Akira Takanashi, a dry girl, has discovered a secret. The cool and beautiful prince of the school, Yoichi Oribe, is a "onee" (onee). He is good at making sweets, is always on high spirits, and loves girls...? This is a love comedy between a tsundere onee boy and a fast-paced girl!