Nakasetagari no Hasugaya-kun

Due to his past trauma, Yanai, a high school student, has difficulty expressing his emotions. One day, as he searches for ways to change himself, he finds out that his classmate, Hasugaya's family runs a chiropractic clinic that relieves emotional stiffness. After begging the reluctant Hasugaya to give him a treatment, Yanai is able to cry for the first time in years...and doing so makes Hasugaya ecstatic.

(Source: Kadokawa, translated)