Happy Birthday Chitose-kun

On his birthday, Chitose Tada, a university student, spends the day by himself. He recalls Koutaka, a former high school classmate who had transferred to his school in the second year. Koutaka was tall, athletic, and calm, but Chitose initially found him uncool. Later, he discovers more about Koutaka's true personality and becomes drawn to him. The story reflects on the relationship between a straightforward boy and a complex college student. An additional chapter is included.