Are wa Senkou, Bokura no Shinjuu

Overview

Shima Yuki, 15, attends a junior high school attached to a music college. His life, which had been all about piano, takes a dark turn, and he runs away from home on his bicycle on a winter night. He gets lost and is chased by a delinquent, where he encounters Miroku, a 25-year-old host who shines as brightly as the night sky. He clings to the drunk Miroku and tumbles into his room, where he finds himself. A heartwarming story woven by two people with their own problems and nowhere to go. (Source: Comic Seasons, translated)

Source: AniList