The first book in the series, Hi! Korean 1A, introduces the consonants and vowels of the Korean language to learners who are new to Korean, and presents the basic grammar and vocabulary necessary for learners to use conversational expressions that they may encounter in real life, such as introductions, dates and times, and purchases.

The Hi! Korean series is an integrated Korean coursebook designed for foreign learners who love Korean culture and want to learn Korean. The textbooks incorporate the latest trends in Korean culture and provide a variety of activities to help learners master the four skills of speaking, listening, reading, and writing.

While maintaining a consistent organization from beginner to advanced, it organically presents the areas of speaking, listening, reading, and writing, and separates listening and reading by section to enhance learning by section. In particular, in the step-up course, students are encouraged to develop their communication skills by expanding their learning through speaking and writing activities.

The overall composition of Hi! Korean Series includes 10 student books (4 for beginners, 4 for intermediate, and 2 for advanced), which include 'Grammar and Vocabulary Book' as a separate book, and 10 workbooks (4 for beginners, 4 for intermediate, and 2 for advanced) sold separately.