▶ Into the forest of practical accompaniment with Joy and Professor Jo Hee-soon!
ㆍThe legendary cumulative sales of practical accompaniment textbooks! An upgraded practical accompaniment textbook from Professor Cho Hee-soon, the world's leading accompaniment expert!
ㆍ1 bean, 2 bean, 3 bean, 4 bean, 5 bean! Master the code in one go with Kongchigi!
What items are hidden in Banbi and Goya's dressing room? A mysterious accompaniment textbook with easy-to-follow explanations!
ㆍPlay melody and chord accompaniment at the same time! You can play while singing.
Try out 'Joy Teacher Concert'!
ㆍChange your class! Good news for teachers who lack confidence in practical accompaniment! Try out a fun practical accompaniment class with Jo Hee-soon's secrets!

▶ All my favorite songs are here!
Nice to meet you / Let's catch a mouse / Cocomong / Little star / Sad mountain rabbit / Sad butterfly / Kimchi radish kimchi / Dokdo is our land / Beauty and the Beast / Petite Pinocchio / Handsome Tomato / Oh, Victory Korea / A school of crocodiles / Ponyo on the daughter-in-law / Grandfather's clock / Little squirrel Tommy / Little dinosaur Dooly / Doremi Song / Salamander / Flying Petals / Goblin and the devil grandmother / Four-leaf clover / Pretty baby bear, etc., a total of 41 songs