Kakao 79%カカオ ７９％ (Japanese); 카카오79% (Korean); Kakao 79; Cacao 79; Chocolate 79 (English)

Ayano, Tsubasa and Ichinose, Yuu are childhood friends. Since they were kids, they were inseparable. But one day they have to part each other's way because both of them are transferring homes. Clueless of where they will transfer, they were shocked when they see each other going to the same school from the place they transferred in.